Baleaf Men's 3D Padded Cycling Bike Compression Shorts UPF 50+ Size M 80% Nylon/20% Spandex/UPF 50+ UPF 50+ fabrication protects your skin during outdoor activity by blocking harmful Ultraviolet rays Breathable fabric wicks quickly away moisture and keeps you cool and dry while riding Anatomic 3D Chamois is male-specific and non-chafing with padding in key areas, provides miles and miles of comfort Reflective elements improve safety in night riding or low-sight condition Leg grippers with silicone dots inside keep shorts from riding up. Waist Size chart: S=30-32" M=32.5-34.5" L=35-37" XL=37.5-40" XXL=40.5-42.5"