Mangrove Sun Gloves were developed to protect your hands from sun damage, yet leave them totally free to tie knots, thread leader tippets on flies, and handle tackle. The thin but tough material filters those dangerous sun rays. SPF 50; 81.5% nylon; 18.5% spandex. On a hot day, if you dip the Mangrove Sun Gloves in water, the evaporation cools your hands. Small enough to fit in a pocket. Imported.