UPF Clothing and Sun Hats Guide

Sunscreen isn’t the only option. UPF clothing is simple to use, you don’t need to reapply it, and it doesn’t wear off like sunscreen. But not all UPF clothing is created equal.

A cotton T-shirt offers almost no meaningful sun protection — especially when it’s wet. A purpose-built UPF shirt, on the other hand, can block 98% of UV radiation without any lotion, spray, or reapplication. For people who spend significant time outdoors — swimmers, hikers, gardeners, runners, outdoor workers — UPF clothing is often a better solution than sunscreen alone.

This guide covers what UPF ratings actually mean, how fabric characteristics affect protection, the best garment types for different activities, when you don’t need special clothing at all, and how to care for UPF gear so it keeps working.

What Is UPF?

UPF stands for Ultraviolet Protection Factor. It’s a rating system, standardized under ASTM D6603 in the United States, that measures how much UV radiation a fabric allows through to your skin.

The math is straightforward: a fabric with a UPF rating of 30 allows 1/30th (about 3.3%) of UV radiation to pass through, blocking ~96.7%. A UPF 50 fabric allows 1/50th (2%) through, blocking ~98%. The ASTM standard adopted the Australian/New Zealand classification system:

The lowest possible rating under ASTM D6603 is UPF 15, and the highest is UPF 50+. Any fabric that tests above UPF 50 is simply labeled UPF 50+ (ASTM D6603 Standard).

The Skin Cancer Foundation’s Seal of Recommendation requires a minimum UPF of 30 and that the fabric be tested after simulated wear and laundering (Skin Cancer Foundation: Sun-Protective Clothing).

UPF vs SPF: These measure different things. SPF (Sun Protection Factor) measures how well a sunscreen protects against UVB radiation only — the burning rays. UPF measures protection against both UVA and UVB. A UPF 50 garment blocks 98% of all UV radiation in both spectra. SPF 50 sunscreen, when applied correctly (which it rarely is), blocks about 98% of UVB but varies significantly on UVA protection depending on the formulation (FDA: Sunscreen vs. Sun-Protective Clothing).

What Affects UPF

Not all fabrics offer the same level of protection, even if they’re not labeled. The following factors determine how much UV a fabric blocks:

Fabric Type

Synthetic fibers like polyester, nylon, and Lycra generally offer better UV protection than natural fibers. They can be engineered with UV-absorbing additives during manufacturing, and their tight weaves naturally block more radiation. Cotton and linen, by contrast, are loosely woven and allow significant UV penetration (NIH: UV-Protective Clothing).

• Polyester: Naturally high UPF due to its chemical structure — it absorbs UV rather than transmitting it.
• Nylon: Good UPF when tight-weave or treated. Loses protection when wet unless specified.
• Cotton: UPF ~5–8 for a typical white T-shirt. Drops to UPF ~3 when wet.
• Linen: Very low UPF — loose weave and thin fibers allow substantial UV transmission.
• Denim: UPF ~1,700. Yes, really. Dark, thick, tightly woven denim blocks virtually all UV (Skin Cancer Foundation: The Sun-Protective Power of Denim).

Weave Tightness

The tighter the weave, the fewer gaps between fibers for UV rays to pass through. Hold a garment up to the light — if you can see through the fabric, UV can pass through. This is why a loosely woven linen shirt offers poor protection while a tightly woven nylon sun shirt blocks 98%+ (CDC: Sun Safety — Clothing).

Color

Darker colors absorb more UV radiation before it reaches the skin. A dark blue cotton T-shirt has a UPF of about 20 or higher, while a white cotton T-shirt of the same weave might have a UPF of 5. Black, navy, and dark green outperform white, pastels, and light gray (MangGear: Understanding UPF Ratings).

Weight and Thickness

Heavier fabrics with higher thread counts block more UV. A thick denim jacket blocks virtually everything; a sheer chiffon blouse blocks almost nothing. Thickness and weight are the simplest predictors of protection in non-UPF-rated clothing.

Stretch

When a fabric stretches, the gaps between fibers widen, and UPF decreases. This is important for performance fabrics like yoga pants, swimsuits, and compression gear — the UPF rating on the label applies to the unstretched fabric. A UPF 50+ fabric stretched 20% may test at UPF 20–30 (NIH: UV-Protective Clothing).

Wet vs. Dry

Many fabrics lose significant UPF when wet. A cotton T-shirt goes from UPF ~5 to UPF ~3 when soaked — essentially no protection. Some UPF-rated garments (particularly rash guards and swim shirts) are tested both wet and dry and maintain their rating. Others are tested dry only. Check the label or product description; if it doesn’t specify “wet” testing, assume the rating applies only when the garment is dry (Skin Cancer Foundation: Sun-Protective Clothing).

Wear and Tear

UPF ratings are based on new, undamaged fabric. Sun exposure, repeated washing, chlorine, and general wear gradually degrade UV protection over time. The Skin Cancer Foundation notes that UPF ratings are tested after simulated wear and laundering, but actual field use — especially in chlorinated or salt water — will eventually reduce effectiveness. When a garment becomes faded, thin, or develops holes, its UPF rating has dropped.

Types of UPF Clothing

Sun Shirts and Rash Guards

The most common UPF garment. Sun shirts come in two main styles: button-downs (for casual/everyday wear) and pullover hoodies or crew necks (for active use). Rash guards are the swim-focused version — tight-fitting, quick-drying, and designed to be worn in water.

Key brands:

• Coolibar — The first clothing company to receive the Skin Cancer Foundation’s Seal of Recommendation. Their UPF 50+ fabric is tested wet and dry, and they cover everything from shirts to pants to hats to gloves. Coolibar’s UPF 50+ Men’s Stretch Knit Shirt ($45–55) and UPF 50+ Rashguard ($50–65) are frequently recommended by dermatologists. The company publishes its testing protocols and third-party verification (Coolibar: Sun Protection).
• Columbia PFG (Performance Fishing Gear) — The PFG line is built around sun protection and moisture management. Many pieces use Omni-Shade UPF 50 fabric that’s tested wet and dry. The Columbia PFG Tamiami II Long Sleeve Shirt ($40–55) is one of the most popular sun shirts on the market and routinely tops Wirecutter’s recommendations. Available in both button-down and half-zip styles (Wirecutter: Best Sun-Protection Clothing of 2026).
• Patagonia Capilene Cool Daily Hoody — UPF 50+ fabric, made from recycled polyester/Elastane blend. Designed for high-output activities where breathability matters. The hoody version covers your neck and the back of your head — a significant advantage over crew-neck or button-down styles. The fabric stays UPF 50+ after multiple washings (Patagonia: Capilene Cool).
• Uniqlo Airism UV Protection — Uniqlo’s Airism line offers UPF 40+ garments at very low prices ($15–20). The fabric is extremely lightweight and breathable — almost like wearing nothing — but the UPF rating applies only when the fabric is dry. A budget-friendly option for casual, non-water use. The UV cut line includes hoodies, cardigans, gloves, and face covers (Uniqlo: Airism UV Protection).

UPF Pants and Leggings

For hiking, outdoor work, long days in the sun, or any situation where covering your legs is practical, UPF-rated pants and leggings provide continuous protection without sunscreen.

• Columbia PFG Glacial Half-Zip Pant ($50–70) — UPF 50 fabric, lightweight and quick-drying. Converts to capri length with zip-off cuffs.
• Patagonia Pack Out Pants ($79–99) — UPF 50+, durable stretch nylon. Designed for hiking and fieldwork with reinforced knees.
• RabbitKIN UPF Leggings ($45–65) — For women: UPF 50+ leggings for running, hiking, or layering. High-waist style, moisture-wicking, tested to ASTM D6603.
• Outdoor Research Ferrosi Pants ($80–100) — UPF 50, stretch woven fabric. Highly breathable for warm-weather hiking.

Sun shirts get most of the attention, but for anyone working or hiking through sun-exposed terrain — desert trails, alpine ridges, open farmland — UPF pants eliminate the need to sunscreen your legs on days when you’re in and out of the sun repeatedly.

Sun Hats with UPF Rating

A sun hat with a UPF-rated fabric and a wide brim protects the areas that sunscreen often misses: the scalp, ears, back of the neck, and the top of your head. UV exposure to the scalp and ears is a common cause of skin cancer in older adults, particularly men (Skin Cancer Foundation: Sun-Protective Hats).

Key models:

• Sunday Afternoons Ultra Adventure Hat ($40–50) — Widely considered the best sun hat for hiking and outdoor activities. UPF 50+ fabric, 3-inch brim, ventilated crown, chin cord, with a dark underside to the brim that reduces reflected UV from water and snow. Wirecutter’s top pick for hikers and overall sun hat champion (Wirecutter: Best Sun Hat of 2026). Sunday Afternoons requires all of their hats to pass ASTM D6603 testing and the Skin Cancer Foundation’s recommendations.
• Columbia Bora Bora II Booney Hat ($28–35) — UPF 50 nylon fabric, 3.7-inch brim, packable, chin cord. The most popular budget sun hat. Originally designed for fishing but adopted by hikers, gardeners, and anyone who needs a packable wide-brim hat. The brim is slightly longer than the Sunday Afternoons Ultra Adventure, offering more shade at the cost of bumping into things when it’s on your back (Outdoor Gear Lab: Best Sun Hats of 2026).
• Tilley LTM6 Airflo Hat ($80–100) — Tilley’s Endorsed range is tested to UPF 50+ (standard Tilley hemp/cotton hats are rated UPF 30–40 depending on color). The LTM6 Airflo is their most breathable sun hat, with a mesh ventilation band and moisture-wicking sweatband. Tilley hats have a lifetime guarantee — they’ll replace it if it wears out. The weight on a Tilley is up there with the others, but the durability and warranty make it a buy-it-for-life option for sun protection.
• Patagonia Quandary Brimmer Hat ($55–65) — UPF 40+, 3-inch brim, adjustable fit. Made from recycled nylon. Lighter than the Tilley but less ventilated than the Sunday Afternoons.

When choosing a sun hat, make sure the brim is at least 3 inches all around. Hats with a narrow brim or no back brim (like baseball caps) leave your ears and neck exposed — two of the most common sites for skin cancer.

UPF Gloves and Arm Sleeves

For driving, gardening, or cycling, UPF gloves and sleeves provide protection for hands and forearms without committing to a full long-sleeve shirt.

• Coolibar UPF 50+ Sun Gloves ($25–35) — Fingerless driving gloves with UPF 50+ fabric. Popular with long-distance drivers (especially in Australia and the southwestern U.S. where one arm gets hours of direct sun through a driver-side window).
• Columbia PFG Sun Sleeves ($15–20) — UPF 50, slip-on arm sleeves that cover from wrist to bicep. Ideal for runners and cyclists who want arm coverage without a long-sleeve shirt.
• Uniqlo Airism UV Protective Gloves ($10–15) — UPF 40, lightweight fabric. Basic but effective for casual use.

Choosing Based on Activity

The right UPF garment depends on what you’re doing:

Water Sports (Swimming, Surfing, Kayaking, Snorkeling)

Best choice: Rash guard or long-sleeve swim shirt.

Rash guards are designed for wet use — they maintain their UPF rating in the water, dry quickly, and don’t get heavy when saturated. Look for one that specifies UPF 50+ tested wet. The Coolibar UPF 50+ Rashguard and the Patagonia Capilene Cool Daily Hoody are both excellent options. For kayaking or stand-up paddleboarding, add a wide-brim sun hat (Sunday Afternoons or Columbia Bora Bora) — the water surface reflects UV and hits your face from below (Skin Cancer Foundation: Sun Protection for Swimmers).

Hiking and Trail Running

Best choice: Sun hoodie + wide-brim sun hat + shorts or convertible pants.

A sun hoodie (like the Patagonia Capilene Cool Daily Hoody) covers your neck and the back of your head — the two spots most exposed on a trail runner or hiker. Paired with a Sunday Afternoons Ultra Adventure Hat, you have head-to-hip coverage without a single application of sunscreen. For legs, UPF shorts or convertible pants give you coverage options without overheating.

Everyday Wear (Walking the Dog, Running Errands, Lunch Outside)

Best choice: UPF-rated button-down or polo.

Columbia PFG Tamiami II or Uniqlo Airism UV top are casual enough for daily wear but provide UPF 40–50 protection. They look normal — no one will know you’re wearing sun-protective clothing. A UPF hat in a neutral color (khaki, black, navy) is optional but recommended if you’re outside more than 15 minutes.

Gardening and Yard Work

Best choice: UPF sun hat + sun sleeves or long-sleeve shirt + UPF pants.

Gardening means constant sun exposure, usually at the hottest part of the day. A wide-brim hat (Columbia Bora Bora II Booney) shades your face and neck. Sun sleeves or an old UPF shirt protect your arms. For kneeling and weeding, UPF pants or leggings keep your legs covered without feeling heavy. Sun gloves protect your hands while still letting you grip tools.

Driving

Best choice: UPF sun sleeve (driver’s arm) or UPF gloves.

Long drives with the driver’s window down expose one arm to hours of direct UV. A UPF sun sleeve on your left arm (in left-hand-drive countries) takes two seconds to put on and eliminates the need to sunscreen one arm. For convertible drivers, UPF gloves and a UPF hat complete the setup.

When You Don’t Need UPF Clothing

Not every situation requires specialty sun-protective clothing. Many everyday garments already provide excellent sun protection without a UPF label.

• Denim: UPF ~1,700. A pair of jeans is effectively a total UV barrier. You do not need UPF-labeled denim.
• Wool: Heavyweight wool (a winter coat or sweater) provides excellent protection. Lightweight merino base layers may not — test by holding up to light.
• Heavy cotton or canvas: Thick, dark-colored, tight-weave cotton garments (a work shirt, a Carhartt jacket) provide significant sun protection.
• Synthetics you already own: Tight-weave polyester/nylon athletic wear (gym leggings, compression shirts) often provides UPF 30+ without being labeled as such.

The situations where you don’t have adequate protection are: thin/loose-weave white cotton T-shirts, linen, sheer or lightweight blouses, any wet cotton garment, and anything worn faded or threadbare.

Caring for UPF Clothing

UPF clothing lasts longer and performs better with proper care.

• Wash in cold water with a gentle liquid detergent. Hot water can degrade the UV-absorbing compounds over time.
• Avoid bleach and fabric softeners. Bleach breaks down fibers and can reduce UPF rating. Fabric softener coats UV absorbers, reducing their effectiveness. Coolibar explicitly warns against both (Coolibar: Garment Care).
• Line dry or tumble dry low. High heat in a dryer can degrade the elastic fibers that maintain tight weave tension.
• Don’t overstretch. Putting on a wet rash guard by pulling on the hem rather than rolling it on gradually stretches the fabric more than necessary. This reduces UPF at the stressed points over time.
• Watch for sunscreen stains. Sunscreens containing titanium dioxide or zinc oxide can cause yellow or white staining on UPF fabrics, especially dark ones. Apply sunscreen, let it dry, then dress. If staining occurs, a pre-treatment with a dab of gentle laundry detergent before washing usually lifts it.

The good news: multiple studies have shown that repeated home laundering does not reduce UPF ratings in properly constructed woven and knit synthetic fabrics. If anything, some cotton blends show a slight increase in UPF after washing due to shrinkage — tighter weave = more protection (AATCC: UV Protective Textiles) (Sun Protection Zone: UPF After Laundering).

The Bottom Line

UPF clothing is the easiest sun protection system: put it on once, and you’re covered for the day. No reapplications, no missed spots, no greasy residue.

For most people, one or two UPF garments cover the most common exposure scenarios:

• A sun shirt (Columbia PFG, Patagonia Capilene, or Coolibar) covers hiking, gardening, and everyday outdoor time.
• A wide-brim sun hat (Sunday Afternoons or Columbia Bora Bora) protects your head, face, ears, and neck.
• A rash guard adds water-sports coverage when you need it.

That’s three items — under $150 for all of them — that replace bottles of sunscreen for most of your outdoor activities. The trick is buying them, keeping them accessible (hang them by the door or keep them in your car), and putting them on before you go outside. The CDC, Skin Cancer Foundation, and every dermatology organization agrees: covering up is the most effective form of sun protection (CDC: Sun Safety). UPF clothing just makes covering up comfortable enough to do.

This article is part of our complete sun protection investigation. See also our guides on sunscreens, sun protection strategies for kids, and UV index awareness.