Perfect for on the boat or on the trail. This neck gaiter keeps you extra cool with sweat-activated cooling material and moisture-management. UPF 50 blocks the sun. Fit & Design Uses: Water, Trail, Fishing Laser cut venting Height (S/M & L/XL): 14" Front, 16" Back, 12" Side Width (S/M): 8.5" Top, 9.5" Bottom Width (L/XL): 10.25" Top, 11.25" Bottom Technology Omni-Freeze ZERO(TM) sweat-activated super cooling Omni-Shade(TM) UPF 50 sun protection Omni-Wick(TM)