Sunscreen vs. UPF Clothing: Why You Need Both for Total Sun Protection

June 1, 2026

Brant Bowers, Camping Department Manager at Bill Jackson’s Shop for Adventure

Sunburns are more than just a painful souvenir from a day on the water, they’re a warning. With 1 in 5 Americans developing skin cancer by age 70, your first line of defense isn’t in a bottle; it’s in your closet. Although the survival rate is very good, you may wish to avoid it altogether. Sunscreen only works if you’re diligent about reapplying it: a tall order when you’re in the middle of an adventure. Is there a way to get all-day protection without the constant greasy cleanup? The answer is simpler than you think. The first line of defense against skin cancer is your clothing. Sun protective clothing is a growing part of the apparel market.

Performance Over Bulk: How Modern Sun Gear Beats the Heat

To be honest, most clothing has some level of sun protection. There are two things that define sun protective clothing. One is an independent testing of how much protection it gives. The other is what keeps it from being uncomfortable on scorching hot days. It is counter intuitive to wear long sleeve shirts and pants when it is hot. I know walking a midday trail in a wide-brimmed hat and long sleeves looks a little odd at first, but once you feel the airflow and skip the sunburn, you’ll never go back.

Decoding UPF: How Much Protection Are You Actually Getting?

UPF 50: Blocks 98% of UV rays.
UPF 30: Blocks 97% of UV rays.
UPF 15: Blocks 94% of UV rays.
A standard white T–Shirt blocks about 5-7% of UV rays.

Pro Tip: The difference in protection between UPF 30 and 50 is only 1%, but the difference in breathability is huge.

Sun protection with apparel is defined by its UPF rating. Think of a UPF rating as a shield. A UPF 50 rating means only 1/50th of the sun’s UV radiation reaches your skin. In plain English? It’s blocking 98% of harmful rays. Manufacturers use independent labs to verify these numbers, so you don’t have to take their word for it.

Fabric weave density, type, color and weight affect its UPF rating. In the field, getting wet can lower its protection by up to half. All rash guards, clothing meant to be worn in the water, have a rating of at least 50 UPF. Wearing them while swimming can reduce it to 25 UPF. No need to worry too much. Do the math and you’ll find it still blocks 96% of the Sun’s harmful rays.

Breathability vs. Protection: Finding Your Ideal UPF Level

The other benefit sun protective clothing provides is comfort. Manufacturers design the apparel to be light and cool. This is why you’ll find UPF ratings as low as 15. When wearing a 50 UPF shirt out of the water, it will seem a bit hot. Swap that shirt out for a 30 or 15 UPF (97% or 94% protection) and you’ll be more comfortable.

There are also cooling technologies added to some fabric to make it less hot. Clothing can also be treated with Permethrin, an insect repellent. There are UV protection additive sprays on the market, but I haven’t seen adequate stats on how they influence UPF ratings. I feel those sprays are best used to protect gear against UV breakdown.

Mind the Gaps: Protecting the Areas Your Shirt Can’t Reach

Total protection is a strategy of layers. Start with your UPF apparel, then ‘plug the gaps’ with gaiters, sun-gloves and protective footwear. Since no outfit covers every inch, use sunscreen to shield your face, ears and wrists. By combining high-tech fabrics with targeted sunblock, you’re doing more than just preventing a burn; you’re making a long-term investment in your skin’s health.

Sun Protection for Tampa Bay Adventures: Visit Your Local Adventure Outfitter, Bill Jacksons!

Florida’s outdoor conditions demand more from your sun protection than most guides account for. On the Gulf, UV intensity is amplified by water reflection. On the trail or kayak launch, reapplying sunscreen is rarely realistic. That’s why our team at Bill Jackson’s Shop for Adventure recommends building your sun protection strategy around UPF-rated apparel as the foundation, with targeted sunscreen on your face, ears, and hands as the backup.

Stop by our Adventure Clothing department at Bill Jackson’s Shop for Adventure, 9501 US Highway 19 N, Pinellas Park, FL 33782, or call us at (727) 576-4169, to see our current selection of sun protective shirts, hats, and pants designed for Florida conditions. Our staff are outdoor enthusiasts who fish these waters, kayak these bays, and spend real time in this sun.

Adventure more, worry less. Your future self will be glad you did.

FAQ

Q: What is the difference between UPF and SPF?

A: UPF is a rating that is used for clothing. SPF is used to rate sunscreen. It is a factor of time protected from damage from the sun. Without protection your skin will burn in about 15 minutes. A sunscreen with an SPF of 30 would protect 30 times that or 450 minutes (7.5 hours). This is only if the sunscreen hasn’t washed or sweated off. It is recommended to reapply often.

Q: Why do some clothing use SPF ratings?

A: The simple answer is marketing. Some manufacturers use the rating SPF 100+ which sounds twice as good as UPF 50+. The fact is that they are functionally the same protection. Advertisers hope customers will only see the number.

Q: Do UPF shirts work?

A: Yes, and they’re independently verified, not just manufacturer claims. UPF shirts are tested by third-party labs. A UPF 50 rating means only 1/50th of the sun’s UV radiation reaches your skin, blocking 98 percent of harmful rays. That protection is built into the fabric itself, based on weave density, weight, and fiber type. One thing to keep in mind: wet fabric can reduce UPF effectiveness, so rash guards worn while swimming provide somewhat less protection than when worn dry.

Q: How long do UPF shirts last?

A: UPF protection is woven into the fabric structure itself, not applied as a coating, so it holds up well through regular use and washing. Most quality UPF garments maintain their rating for years of normal use. The main factor that reduces protection temporarily is moisture: wet fabric performs below its rated UPF level. For specific wash cycle guidance or brand warranty details on the UPF apparel we carry, ask our staff when you visit Bill Jackson’s Shop for Adventure.

Q: Why does SPF 50 sunblock seem so hot on my skin?

A: It is like UPF in clothing. It provides better protection, but it can be heavier and affect your skin’s ability to breathe. Try a lower SPF and reapply more often.

Q: Do cooling technologies really work?

A: My experience with these technologies is that it takes the edge off the heat. To expect them to function like an air conditioner is not realistic. But every little bit helps.