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Article: What is UPF clothing?

Family in SwimZip sun protective swimwear by the pool—What is UPF clothing?

What is UPF clothing?

UV rays damage your skin and cause skin cancer. UPF clothing blocks these rays through special fibers and fabric construction. Unlike regular clothes that let UV radiation pass through, UPF-rated garments give you reliable, all-day sun protection.

Quick links:

About UPF clothing

What are the benefits of UPF clothing?

Types of UPF clothing

What factors affect UPF ratings?

How to choose the right UPF clothing

For your summer adventures by the water, choose SwimZip sun-protective swimwear. From kids' sunsuits to rash guards to one-piece swimsuits for women, you will find everything you need for safe, stylish fun in the sun.

About UPF clothing

UV-protective clothing guards your skin at the fabric level to prevent harmful ultraviolet rays from reaching your skin. Think of ultraviolet protection factor (UPF) as sunscreen woven into your clothes; but without the oily mess.

UPF measures how much UV radiation a fabric blocks. A UPF 50+ rating means the garment blocks 98% or more of ultraviolet light. This protection comes from the fabric's structure, not chemical treatments, so it won't wash out or fade over time.

Unlike everyday clothes that let UV rays pass through, UPF-rated garments give your skin consistent, reliable protection. A standard white T-shirt has a UPF rating of only 5–7, which means it lets most UV rays reach your skin.

What are the benefits of UPF clothing?

UPF clothing goes beyond sunscreen's protective power. With built-in sun protection, UPF garments block UV rays every time you wear them. Here are some of the benefits that set UPF clothing apart:

  • Permanent protection: Unlike sunscreen which requires reapplication, sun protection built into UPF clothing never wears off. UPF fabrics protect despite washing, swimming, and regular wear.
  • Full coverage: UPF clothing creates a physical barrier against sun damage. It protects every inch of covered skin, including areas you might miss with sunscreen. Long-sleeved shirts and other UPF garments shield vulnerable spots such as shoulders and back.
  • Cost-effective: The initial price may be higher than regular clothing, but UPF garments eliminate ongoing sunscreen expenses for covered areas. Plus, these pieces often last longer than natural fabrics because they use synthetics built for durability.
  • Perfect for sensitive skin: People with sensitive skin often react to sunscreen chemicals. UPF clothing offers chemical-free protection to reduce the risk of skin irritation while blocking harmful rays.
  • Peace of mind: With UPF clothing, you know exactly how much protection you're getting. The UPF rating tells you precisely how well the garment blocks UV rays, so you can be confident about sun safety.

Types of UPF clothing

From sun shirts to rash guards, each style of UPF clothing works for specific situations. Here's a breakdown of common UPF garments and when to wear them.

Rash guards and swim shirts

Rash guards block rays during water activities. The tight weave construction stays protective when wet, unlike a standard white T-shirt that lets UV rays pass through after soaking. 

Synthetic fibers in rash guards dry fast, and flat-lock seams prevent chafing. These water-ready shirts come in short and long-sleeve styles, with UPF 50+ ratings for the highest level of sun protection.

Beach and surf wear

Beach and surf gear stand up to salt, sun, and sand. Swim bottoms with UPF 50+ block rays while the stretchy fabric moves through waves and water sports. Board shorts and surf leggings stay in place during active water sports and include quick-dry properties for comfort between sessions.

Hiking and outdoor clothing

Mountain and trail UPF clothes balance protection with ventilation. Breathable fabrics in pants and shirts wick sweat on tough trails. 

A breathable hoodie, for example, shields your neck and ears from high-altitude UV exposure. Zip-off pants legs adapt to changing temperatures, while mesh panels vent heat during intense climbs.

Athletic and workout gear

Sport-specific UPF clothes withstand high-intensity training. Lightweight fabric construction wicks sweat during cardio sessions. Tennis skirts and running shorts with built-in UPF protection block rays through hours of outdoor practice. The synthetic fibers resist wear from repetitive movements and regular washing.

Sun hats and accessories

Wide-brim hats block UV rays from your face, neck, and ears. Sunglasses with UV protection complete your sun defense setup. Many hats pack flat for travel and spring back to shape.

Women in SwimZip swimwear with wide brim sun visors at the beach—What is UPF clothing?

 

What factors affect UPF ratings?

The UPF rating of clothing depends on these traits:

  • Fabric color: Darker colors absorb more UV rays than light ones. A black T-shirt blocks more rays than the same shirt in white. Vibrant colors also absorb UV rays better than pale shades.
  • Fabric construction: Tight weaves create smaller gaps between threads, blocking more rays. Loose knits let more UV light pass through to your skin. Thicker fabrics naturally block more rays than thin ones.
  • Fiber type: Natural fibers such as cotton block fewer rays than polyester fabrics. Many synthetic fabrics come with built-in UV blockers in their structure. Some manufacturers add titanium dioxide or zinc oxide to boost UV protection.
  • Stretch: When fabric stretches, the spaces between fibers grow larger. A UPF garment loses some protective power when pulled tight. Darker fabrics maintain better protection even when stretched.
  • Age and wear: New garments block more rays than old, worn ones. Washing and wearing stretch fibers over time. Tighter weave construction maintains protection longer than loose weaves.

How to choose the right UPF clothing

Your UPF clothing choice stands between your skin and harmful UV rays. Here's what to check before you buy.

  • Protection level: A UPF 50+ rating blocks 98% of UV rays. Don't choose anything less than UPF 30 for outdoor activities.
  • Activity type: Your beach day demands different protection than your mountain hike. Pick clothes that match your movement and environment.
  • Weather conditions: Hot climates need breathable hoodies and vents. Cold weather requires layerable pieces.
  • Fit: Loose clothes sag in water. Tight clothes strain at the seams. The right fit keeps your UV light shield intact.
  • Durability: Salt water, chlorine, and sweat attack fabrics. Quality construction withstands your specific activity demands.
  • Care requirements: Some pieces need special washing. Others resist fading. Pick clothes that fit your maintenance habits.
Girls in Tropadelic swimwear by SwimZip in the water—What is UPF clothing?

 

Stay safe with SwimZip

SwimZip puts UV protection clothing first. Our UPF 50+ swimwear blocks 98% of UV rays through durable, sun-tested fabrics. From family matching sets to kids' sunsuits, every piece combines strength with style. 

Plus, our signature zip-front designs take the struggle out of beach changes. When your family needs adequate sun protection, SwimZip has you covered.

UPF clothing FAQ

What is the point of UPF-rated clothing?

UPF-rated clothing blocks harmful UV rays that cause skin damage and skin cancers. Unlike regular clothes that let ultraviolet radiation pass through, UV protection clothing creates a reliable barrier between the sun and your skin.

Is SPF better than UPF?

SPF and UPF measure different things. Sun protection factor (SPF) rates how well sunscreen blocks UV rays, while UPF measures a fabric’s UV-blocking ability. Both work together for complete protection. Learn more about the differences between SPF and UPF.

Does UPF wash out of clothes?

The UPF doesn’t wash out of clothes. UPF comes from the fabric's physical structure and the level of protection stays constant through washing. The UV-blocking power is built into the weave and fiber type, not added as a treatment.

How long does UPF fabric last?

UPF clothing lasts approximately 30 to 40 washes; with regular use, the clothing should last about one year.

Do UV rays go through jeans?

Regular denim blocks some UV rays, but its protection isn't reliable. Bright colors and thin spots in the fabric let UV rays reach your skin. For consistent protection, choose garments with UPF ratings.

What are some sun protective tips?

To stay safe in the sun, follow these sun-protective tips:

  • Wear UPF 50+ clothing.
  • Apply broad-spectrum sunscreen on exposed skin.
  • Stay in the shade during peak UV hours (10 AM–4 PM).
  • Cover as much skin as possible.
  • Reapply sunscreen every 2 hours.
  • Wear sunglasses and a wide-brim hat.
  • Check the daily UV index.

Is it better to choose bright or dark colors when in the sun?

The color of your clothing affects comfort more than UV protection. Bright colors reflect heat, keeping you cooler, while dark colors absorb heat. For sun protection, focus on the UPF rating of your clothes; this matters more than color choice.

Further reading

What are the best bathing suits for larger busts?

How to pack a girl’s beach bag

What are the best swimsuits for moms?

What are the best swimwear for small busts?

What are the best bathing suits for women?

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