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Rash guard

A rash guard, also known as a rash vest or rashie, is a tight-fitting athletic shirt made from quick-drying synthetic materials such as spandex, nylon, and polyester, designed to protect the wearer's skin from abrasions, chafing, and sunburn during water-based activities like surfing and swimming.^[1] The garment's name originates from its primary function of preventing "board rash," a skin irritation caused by friction against surfboards or other equipment.^[2] Typically featuring long sleeves for maximum coverage, rash guards provide ultraviolet protection factor (UPF) ratings of 50 or higher, blocking approximately 98% of harmful UV rays to reduce the risk of skin damage from prolonged sun exposure.^[3] Rash guards trace their origins to Australia in the 1970s, where they were developed specifically for surfers seeking defense against skin irritation from saltwater, sand, and board contact, as well as intense solar radiation in coastal environments.^[4] Over time, their utility expanded beyond surfing to include other aquatic pursuits such as paddleboarding, scuba diving, and competitive swimming, where chlorine-resistant variants help maintain fabric integrity in pools.^[4] In non-water sports, rash guards have become popular in grappling disciplines like Brazilian jiu-jitsu (BJJ) and mixed martial arts (MMA), valued for their moisture-wicking properties that keep athletes dry, reduce bacterial spread through skin-to-skin contact, and offer a smooth surface to minimize mat burns.^[5] Modern rash guards are available in diverse variations to suit different needs, including short-sleeve options for milder conditions, hooded designs for enhanced neck protection, and gender-specific fits for men, women, and children.^[6] Materials often incorporate recycled polyester or elastane blends for sustainability and stretch, ensuring four-way flexibility while remaining lightweight and breathable for extended wear.^[7] These features make rash guards not only functional protective gear but also versatile apparel for both recreational and professional use across global watersports and combat training communities.^[8]

Definition and Characteristics

Description

A rash guard is a form-fitting athletic shirt designed primarily to prevent skin rashes caused by friction, abrasion, or environmental factors such as saltwater and sand.^[1] It serves as a protective base layer during water-based activities, offering coverage that minimizes skin irritation from repetitive contact with surfaces like surfboards or equipment.^[6] Also known as a "rashie" or "rash vest" particularly in Australia and other regions, the garment has evolved into broader athletic wear.^[1]^[8] The core purposes of a rash guard include shielding against sunburn through built-in ultraviolet protection factor (UPF) ratings, such as UPF 50+ which blocks over 98% of UV rays, as well as preventing jellyfish stings and reducing chafing under wetsuits or from board contact.^[9]^[10] These functions make it essential for prolonged exposure in aquatic environments, where it acts as a barrier without restricting movement.^[11] Key physical features of a rash guard encompass long or short sleeves, crew neck or raglan sleeve designs, and a compression-style fit that ensures mobility while hugging the body.^[1] It typically incorporates flatlock stitching to minimize irritation and multi-panel construction for enhanced durability and flexibility during dynamic activities.^[6]

Materials and Construction

Rash guards are primarily constructed from synthetic fabric blends that prioritize durability, flexibility, and performance in aquatic and contact environments. The most common composition includes polyester for its moisture-wicking and UV-resistant properties, nylon for enhanced durability and quick-drying capabilities, and spandex (also known as elastane) for stretch and compression.^[12]^[13] Performance-oriented models typically feature an 80% polyester and 20% spandex blend, though variations range from 75-85% polyester with 15-25% spandex to ensure a balance of elasticity and shape retention.^[14] Nylon can be a primary component (e.g., up to 90%) in some blends or incorporated in hybrid formulations to bolster abrasion resistance without compromising breathability.^[15] These fabrics exhibit key properties tailored for active use, such as lightweight construction typically weighing 150-220 grams per square meter (gsm) to facilitate unrestricted movement and rapid evaporation.^[16] Antibacterial treatments, including embedded antimicrobial agents, are commonly applied to inhibit odor-causing bacteria and extend wearability during prolonged sessions.^[17] Water-repellent coatings enhance hydrophobicity, allowing water to bead off the surface for faster drying, while high elasticity from spandex enables four-way stretch for full range of motion.^[18] Construction techniques emphasize comfort and longevity, with flatlock or overlock seams that lie flat against the skin to minimize chafing and irritation.^[19] Reinforced stitching in high-wear areas, such as shoulders and elbows, provides added durability against friction and pulling forces.^[18] Multi-panel designs incorporate ergonomic zoning, like four-way stretch panels under the arms, to optimize fit and reduce bunching during dynamic activities.^[20] Sizing follows compression-style standards, typically ranging from XS to XXL, with gender-specific cuts to accommodate body contours—men's versions offering broader shoulders and women's featuring tapered waists.^[21] A snug, second-skin fit is standard, determined by chest, waist, and hip measurements rather than loose apparel norms, ensuring support without restricting mobility.^[22] Care instructions recommend machine washing in cold water with mild detergent to preserve elasticity and prevent fabric breakdown, followed by air drying to avoid heat-induced shrinkage.^[23] As of 2025, innovations focus on sustainability and advanced functionality, including recycled polyester derived from ocean plastics and PET bottles, which maintains performance while reducing environmental impact.^[24] Antimicrobial treatments, such as those providing odor resistance for up to seven days, have gained traction in intensive use.^[17]

History and Development

Origins

The rash guard originated in Australia in the 1970s as a practical solution for surfers facing skin irritation from prolonged exposure to saltwater, sand abrasion, and friction against surfboards. Developed in response to "surf rash," these garments were initially designed as a thin base layer worn under wetsuits to prevent chafing caused by neoprene seams and surfboard wax buildup.^[1]^[2] The exact timing of their invention remains somewhat unclear, but they emerged within Australian surfing culture during the late 20th century, aligning with the growing popularity of the sport on local beaches.^[8]^[4] Known locally as "rashies" or "rash vests," early prototypes consisted of simple, form-fitting shirts made from nylon-spandex blends that offered quick-drying properties and basic compression without emphasis on ultraviolet protection, which became a later innovation. These designs prioritized mobility and skin coverage to mitigate the repetitive rubbing during paddling and wave riding, providing a lightweight alternative to bare skin or heavier protective layers.^[1]^[2] Commercial availability followed soon after, with prominent Australian surf brands like Billabong and Quiksilver introducing rash guards to the market in the 1980s, starting primarily for male surfers before broadening to include options for women and children. This timing coincided with the surge in professional surfing during the decade, where the apparel gained traction as essential gear for both amateur and competitive participants, embedding it deeply within the evolving surf lifestyle.^[25]^[26]

Evolution and Adoption

In the 1990s, heightened public awareness of ozone layer depletion and its impact on increased ultraviolet (UV) radiation prompted the integration of ultraviolet protection factor (UPF) technology into rash guards, transforming them from basic anti-chafing gear into effective sun-protective apparel. This development aligned with broader efforts to mitigate skin damage from UV exposure, as fabrics began to be engineered to block harmful rays without relying solely on topical sunscreens. As a result, rash guards gained adoption in additional water-based activities, including scuba diving and paddleboarding across the United States and Europe, where they provided dual benefits of rash prevention and UV shielding during extended outdoor sessions.^[27]^[28] The 2000s saw rash guards cross over into combat sports, particularly Brazilian Jiu-Jitsu (BJJ) and mixed martial arts (MMA), where their moisture-wicking and friction-resistant properties helped prevent mat burns during intense grappling sessions. This popularity was boosted by BJJ practitioners with surfing backgrounds who introduced the garment to the mat, and by its visibility in early UFC events, where fighters adopted it as essential underlayer protection. Rash guards became standard attire in no-gi BJJ competitions during this period.^[29]^[30] By the 2010s, rash guards experienced a global surge in the swimwear market, driven by intensified skin cancer awareness campaigns such as Australia's long-running "Slip! Slop! Slap!" initiative, which explicitly promoted slipping on a protective shirt like a rash guard alongside sunscreen and hats to reduce UV exposure risks. Concurrently, advancements in moisture-wicking fabrics expanded their appeal into fitness and yoga communities, where the garments offered comfortable, sweat-managing coverage for indoor and outdoor sessions, appealing to a broader athletic demographic beyond water sports.^[31] Entering the 2020s as of 2025, rash guards have shifted toward eco-friendly materials, incorporating recycled polyester and sustainable dyes in response to growing environmental sustainability movements in the apparel industry. Their versatility has extended into casual athleisure wear. The global rash guard market has reflected this evolution, surpassing $1.8 billion in annual sales by 2025, underscoring their transition from specialized gear to mainstream apparel.^[32]^[33] Key influential factors in this adoption include medical endorsements, such as those from the American Academy of Dermatology, which recommend UPF-rated clothing like rash guards as a primary defense against skin cancer by covering exposed skin more reliably than sunscreen alone. Additionally, regulatory standards from ASTM International, including test methods like ASTM D6603 for labeling and AATCC 183 for UV transmission measurement, have standardized UPF ratings, ensuring consistent quality and boosting consumer confidence in these garments' protective efficacy.^[34]

Types and Variations

Standard Designs

Rash guards are available in several standard configurations tailored to provide core protection against rashes, abrasions, and ultraviolet (UV) rays while accommodating different environmental and activity needs. The most prevalent designs focus on variations in sleeve length and overall coverage, ensuring versatility for general aquatic and outdoor pursuits.^[35]^[36] Long-sleeve rash guards offer full arm coverage from shoulders to wrists, maximizing protection against sunburn and board rash during prolonged sun exposure or cooler water conditions; these are typically torso-length, ending at the hips for mobility. In contrast, short-sleeve versions extend to the elbows or just below, providing reduced coverage suitable for warmer climates or less demanding activities where torso shielding remains the priority, while sleeveless options eliminate arm coverage entirely for enhanced freedom of movement in hot weather. Many standard models incorporate raglan sleeves, which feature a diagonal seam from the neckline to the underarm, promoting greater shoulder flexibility compared to set-in sleeves.^[35]^[36]^[37] Neck styles in standard rash guards commonly include crew necks, which feature a rounded, tagless collar for improved breathability and comfort during extended wear, or mock necks that rise slightly higher to prevent chafing around the neck area without the full restriction of a turtleneck. Both crew and mock neck designs are frequently paired with raglan sleeves to support unrestricted arm motion, making them adaptable for dynamic movements in water-based activities.^[38]^[36]^[37] Adaptations for gender and age build on unisex foundations, with tailored fits to accommodate body differences; for instance, women's rash guards often include V-neck options for a more contoured torso fit, while children's versions use smaller, scaled panels for growing bodies. Standard sizing charts typically reference chest measurements ranging from 28 inches for extra-small adult sizes to 50 inches for extra-large, ensuring a compressive yet non-restrictive fit across demographics.^[36]^[39]^[40] Color and pattern options in standard designs emphasize practicality, with solid colors such as black, navy, or white dominating due to their UV-blocking properties, with darker shades generally providing superior protection by absorbing more UV rays, and ease of maintenance, though basic prints like subtle stripes or geometric motifs add casual aesthetic appeal without compromising functionality.^[36]^[41]^[9]

Specialized Forms

Cropped rash guards feature a midriff-baring crop top style that combines sun and rash protection with aesthetic exposure, particularly popular among women for swim and surf fashion.^[42] These designs typically use stretchy fabrics like 87% Lycra and 13% elastane for full coverage and versatility, allowing wear alone or layered over bikini tops, with built-in SPF 50+ to block UV rays.^[42] They often include details like cut-out backs for added style while maintaining quick-drying and non-transparent properties in light colors.^[42] Rash guard bodysuits provide one-piece full-body coverage from neck to ankles, ideal for toddlers in high-friction water environments to prevent rashes and sunburns comprehensively.^[43] Constructed from organic cotton blends with spandex for stretch and comfort, these variants incorporate UPF 50+ protection and easy snap closures at the crotch for quick changes during play.^[43] The seamless design ensures mobility while shielding sensitive skin areas against sand, saltwater, and abrasions.^[44] Compression-enhanced rash guards offer tighter, performance-oriented fits that apply graduated pressure to support muscles, distinct from standard loose compression by targeting recovery and circulation in activities like combat sports.^[37] Made from high-tenacity bi-stretch fabrics such as polyester-spandex blends, they wick moisture to reduce fatigue and enhance blood flow without restricting movement.^[37] This variant prioritizes durability and anti-odor properties for prolonged wear.^[45] Themed or performance editions of rash guards incorporate specialized reinforcements during grappling to minimize impact and friction. High-visibility variants use neon colors like lime green, pink, and orange to enhance safety for lifeguards, standing out against water for quick identification in emergencies.^[46] As of 2025, emerging editions integrate smart fabrics with embedded sensors to track fitness metrics like heart rate and movement, drawing from advancements in sensor-based textiles for athletic monitoring.^[47] Hybrid designs blend rash guard protection with looser swim shirt silhouettes, providing elevated UPF 50+ ratings for versatile casual wear both in and out of water.^[48] These feature relaxed fits from quick-dry nylon-spandex materials, offering sun defense and comfort without the tight compression of traditional rash guards.^[48] They emphasize breathability and style for everyday beach or land activities.^[49]

Applications and Uses

Water Sports

Rash guards play a crucial role in surfing by preventing board rash from prolonged contact with surfboards and chafing from wetsuits during extended sessions.^[11] Long-sleeve designs are preferred for all-day surfing to maximize coverage against friction and environmental irritants, while quick-dry fabrics facilitate rapid recovery after repeated wipeouts.^[50] These features ensure surfers maintain comfort and focus without compromising mobility in dynamic wave conditions.^[51] In swimming and diving, rash guards provide essential UPF shielding to protect against ultraviolet exposure during open-water swims and scuba activities, where prolonged submersion increases sunburn risk.^[52] Short-sleeve variants are commonly used for pool training to balance protection with ease of movement in controlled environments, whereas full-body suits are recommended for children to guard against jellyfish stings in marine settings.^[53]^[54] This adaptability makes rash guards a versatile layer for both recreational and competitive aquatic pursuits.^[54] For paddleboarding and kayaking, rash guards emphasize a balance of mobility and grip to support paddling efficiency, with slim fits and flat seams reducing drag while allowing full range of motion.^[55] Their adoption in these sports gained traction in the 1990s alongside the rise of recreational watersports, evolving from basic sun protection to performance-oriented gear.^[56] Performance considerations for rash guards in water sports include layering under neoprene suits for temperature regulation, trapping body heat to maintain core warmth in cooler waters without restricting movement.^[57] The fabrics exhibit minimal buoyancy effects due to low water absorption, typically retaining less than standard swimwear to avoid added drag or weight during activity.^[14] This design supports neutral flotation, aiding energy conservation over long sessions. Rash guards adhere to safety standards for UV protection in swimwear, such as UPF 50+ ratings that block over 98% of harmful rays, ensuring compliance for extended exposure in aquatic environments.^[58] In professional events like the Rip Curl Pro surf competition, athletes rely on these specialized rash guards for reliable protection during high-stakes performances.^[59]

Combat Sports

In Brazilian Jiu-Jitsu (BJJ) and wrestling, rash guards serve as a protective base layer worn under the gi or as the primary top in no-gi formats, primarily to shield the skin from mat burns, abrasions, and tears caused by friction during grappling exchanges.^[60] These garments are constructed from lightweight, stretchable polyester-spandex blends that prioritize flexibility, allowing unrestricted movement during rolls and takedowns without adding bulk.^[61] By creating a smooth barrier between the skin and the mat or opponent, rash guards significantly reduce the incidence of skin injuries common in these contact-heavy sports.^[62] In mixed martial arts (MMA) and grappling tournaments, rash guards are often used standalone to manage moisture during intense bouts, with their compression properties helping to support muscles and potentially mitigate fatigue by promoting blood flow and stability.^[63] The form-fitting design wicks sweat away from the body, maintaining a dry surface that aids grip and performance in prolonged engagements.^[64] Under the Unified Rules of Mixed Martial Arts, female competitors are required to wear a short-sleeved or sleeveless form-fitting rash guard or sports bra, while male fighters typically compete shirtless but may use similar compression attire in training or non-UFC grappling events.^[65] As of 2025, the International Brazilian Jiu-Jitsu Federation (IBJJF) mandates that no-gi rash guards be skin-tight, covering the torso to the waistband, and primarily black, white, or a combination thereof, with at least 10% of the surface displaying the athlete's belt rank color (e.g., blue for blue belts).^[66] Large logos or designs that dominate the garment are prohibited to ensure uniformity, though small sponsor patches are permitted in designated areas.^[67] These regulations extend to UFC-affiliated events where rash guards align with broader combat sports standards for safety and identification during weigh-ins and competition.^[68] For training in sweat-intensive sessions, many rash guards incorporate antimicrobial treatments to combat bacterial growth and odors, enhancing hygiene in shared gym environments.^[69] Sublimated graphics allow for team branding directly infused into the fabric, ensuring durability and compliance with competition rules by avoiding peelable patches that could violate size or placement guidelines.^[70] Rash guards contribute to injury prevention in combat sports by minimizing skin-to-mat contact, thereby lowering the risk of abrasions and infections such as ringworm or staph, which are prevalent in grappling disciplines.^[71] Practitioners report fewer friction-related issues when using these garments, supporting consistent training and recovery.^[29]

Other Activities

Rash guards have found utility in fitness and gym environments as base layers during activities like weightlifting and yoga, where their smooth fabric helps prevent chafing from equipment such as barbells or mats.^[72] The compression provided by these garments enhances blood circulation, reduces muscle fatigue, and offers light support to improve performance during intense sessions.^[73] Their popularity in CrossFit workouts surged in the 2010s, with athletes adopting them for moisture-wicking properties and durability in high-repetition exercises.^[74] In outdoor recreation, rash guards serve as protective layers for activities like hiking and gardening, leveraging UPF 50+ ratings to shield skin from ultraviolet rays during prolonged sun exposure.^[75] Loose-fit variants, often designed as hybrid swim shirts, are used in golfing to provide coverage that minimizes skin irritation from repetitive swings and club grips while maintaining breathability.^[76] Medically, rash guards are beneficial for individuals with sensitive skin, offering a barrier that reduces irritation from environmental factors or friction.^[77] In therapeutic contexts, compression-style rash guards aid post-surgery recovery by applying gentle pressure to minimize scarring and support healing, particularly after procedures like top surgery where scar coverage is essential.^[78] Such garments align with broader pressure therapy principles that flatten and soften scar tissue during recovery.^[79] As of 2025, rash guards have integrated into casual fashion trends, blending with athleisure and streetwear aesthetics through brands like Patagonia, which offer versatile designs suitable for everyday layering.^[80] The market has shifted toward inclusive sizing, accommodating plus-size and adaptive needs to promote accessibility in activewear.^[81] This evolution reflects broader activewear trends emphasizing comfort, functionality, and diverse body representation.^[82] Environmentally, rash guards support eco-activities such as beach cleanups by providing sun protection for volunteers engaged in pollution mitigation efforts.^[83] Biodegradable variants, made from materials like Amni Soul Eco nylon, help reduce microplastic pollution by breaking down more readily than traditional synthetics during disposal or laundering.^[84] These sustainable options address concerns over microfiber shedding from conventional polyester blends into waterways.^[85]

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https://www.drparson.com/compression-garments-after-surgery/
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https://www.patagonia.com/shop/sport/surfing/mens/shirts
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The importance of wearing compression garments after surgery
Compression garments can aid in improving scar healing by applying pressure to the scar tissue. This pressure helps to flatten and soften scars, making them ...Missing: rash | Show results with:rash
[82]
Men's Surf Shirts & Rashguards by Patagonia
Water proved—explore men's surf shirts and rash guards for all-day sunscreen that won't wash off at Patagonia.com. Ironclad Guarantee. 1% for the Planet®.Men's Long-Sleeved RØ® Surf... · Men's RØ® Surf Top · T-ShirtsMissing: trends athleisure streetwear inclusive adaptive
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Top 7 Sportswear Trends in 2025 | Stay Stylish & Active - Tack Apparel
Trend 3: Inclusive Sizing and Adaptive Designs. Consumers want their different apparel types, such as yoga apparel, gym apparel, golf apparel, and hunting ...Missing: rash guard Patagonia
[84]
Athleisure trends: Where comfort meets style in 2025 - GWI
Athleisure trends have consistently evolved over the last few years. Learn more about these changes and rising trends in athleisure wear.
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https://anowisurf.com/products/copy-of-second-skin-rash-guard
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Best Eco-Friendly Materials for Swimwear Manufacturing
1. Recycled Nylon (Econyl®) · 2. Recycled Polyester (Repreve® & Other RPET Fabrics) · 3. Biodegradable Nylon (Amni Soul Eco®) · 4. Hemp Blends · 5. Yulex® Natural ...
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Anowi Surfwear - Second Skin Eco Friendly Rash Guard For Women ...
In stock Free deliveryAll synthetic fibers like acrylic, polyester, nylon and spandex release microplastics during laundering. If you have to use the washing machine, please use ...Missing: biodegradable | Show results with:biodegradable