Outdoor enthusiast Dr. Susan Weinkle has found a way to do what she once considered impossible: she can kayak Florida's waterways for five-hour stretches in midsummer and not get a speck of sunburn.
Her secret? Sun protection clothing, specially treated fashions designed to filter ultraviolet rays. Carrying a UPF (ultraviolet protection factor) rating, these clothes, hats and swimsuits have proliferated in the last decade as Americans have become more aware of the sun's hazards .