Ultraviolet Protection Factor (UPF) clothing is designed to shield the skin from harmful ultraviolet (UV) radiation, but its effectiveness can diminish over time due to wear, washing, and fabric degradation. Understanding how long UPF protection lasts and when to replace sun-protective clothing ensures continued protection.
Factors That Affect UPF Durability
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Fabric Composition
Some fabrics, like tightly woven polyester and nylon, provide inherent UV protection, while others, such as cotton or linen, often rely on chemical treatments. UPF-treated fabrics may lose effectiveness over time, especially with frequent washing. (American Academy of Dermatology, aad.org) -
Laundering and Washing
Washing UPF clothing with harsh detergents, fabric softeners, or bleach can break down UV-blocking treatments. Studies show that mechanical stress from repeated laundering can reduce a garment’s UPF rating. To prolong protection, follow the manufacturer’s care instructions. (Skin Cancer Foundation, skincancer.org) -
Wear and Tear
Friction, stretching, and repeated use can thin the fabric and create small gaps, allowing more UV radiation to pass through. A UPF shirt that was once highly protective may offer less coverage after years of frequent wear. (National Cancer Institute, cancer.gov)
How Often Should You Replace UPF Clothing?
Experts suggest replacing UPF clothing every two to three years if worn regularly, or sooner if noticeable wear, fading, or thinning occurs. Clothing used for outdoor sports or frequent swimming may need replacement more often. If a garment becomes stretched out, torn, or excessively washed, it’s best to test its protection or replace it to ensure maximum UV defense. (Skin Cancer Foundation, skincancer.org)
Maximizing the Lifespan of UPF Clothing
- Wash Gently: Use mild detergent, cold water, and avoid fabric softeners or bleach.
- Air Dry: Heat from dryers can weaken fabric fibers and UV-blocking treatments.
- Rotate Garments: Wearing different UPF pieces instead of relying on one can prolong their effectiveness.
- Check for Wear: Hold clothing up to light—if you see through the fabric, its protection is compromised.
Final Thoughts
UPF clothing is an essential tool in sun protection, but its effectiveness isn't permanent. By following proper care and monitoring wear, you can ensure your sun-protective garments continue to offer strong defense against UV radiation. If in doubt, replacing older UPF clothing is a simple way to stay safe in the sun.
