CW-X Men's Endurance Pro Shorts 80% Coolmax, 20% Lycra Imported UPF 50+ For UVA/UVB protection The Support Web provides lower back support, Provides a suspension system for the hamstring muscles, Also supports the quads and hips Excellent support before, during and after activity, Before - to warm up muscles, During - to maximize support and After - to accelerate recovery COOLMAX fabric keeps you cool and dry UPF 50+ For UVA/UVB protection