UPF Clothing Explained: Why a UPF 50 Shirt Beats a Bottle of SPF 50
A UPF 50+ shirt blocks 98% of UV and never needs reapplying, making it the lowest-effort sun protection most people overlook.
UPF 50+ fabric blocks 98% of UV rays and is the minimum required for the Skin Cancer Foundation's Seal of Recommendation for sun-protective clothing.
The Skin Cancer Foundation positions sun-protective clothing as a reliable first line of defense, noting that a UPF 50+ garment blocks 98% of UV and, unlike sunscreen, provides consistent coverage without the need to reapply through the day.
Questions we get a lot
What's the difference between UPF and SPF?
SPF rates how well a sunscreen protects skin from UV, while UPF (Ultraviolet Protection Factor) rates how much UV a fabric blocks. A UPF 50+ garment blocks 98% of UV rays. The advantage of clothing is that it provides steady coverage without needing reapplication the way sunscreen does.
Is a regular cotton T-shirt as good as UPF clothing?
Not usually. Everyday fabrics vary widely, and a thin or light-colored shirt can let significant UV through, especially when wet. UPF-rated clothing is tested to block a defined amount of UV, with UPF 50+ blocking 98%. For reliable protection, the Skin Cancer Foundation points to garments that carry a verified UPF rating.
What does the Skin Cancer Foundation's Seal of Recommendation mean for clothing?
For sun-protective clothing, the Seal of Recommendation requires a minimum of UPF 50+, meaning the fabric blocks at least 98% of UV. The seal is the Foundation's way of flagging products that meet its criteria. Looking for it helps shoppers identify clothing with verified, meaningful sun protection.
r/SkincareAddiction: 'Is UPF clothing actually worth the money, or can I just wear a regular cotton shirt and call it sun protection?'