Improved design with perforated neoprene for drainage during mud races, more precise sizing, and a repositioned zipper for comfort. RockGuard Shin protectors are designed for rope climbs, deadlifts, cleans, snatches, box-jumps anything that punishes your shins. Tall socks can only go so far our specially designed RockGuards are made from 5mm perforated neoprene bonded to a durable outer layer. Slide them on-and-off easily before your WOD and lift with confidence. They drain and dry quickly, making them perfect for Obstacle Course Racing. Say goodbye to injured shins. Lightweight, breathable protection. - Built Tough Our new, 3rd generation RockGuards are made with durable 5mm perforated neoprene on the shin-side and a lightweight, breathable stretch synthetic on the back for easy on-off during your workout. - Not Just the Gym RockGuards are absolutely fantastic for a variety of collision sports including mountain biking, obstacle course racing, and trail-running. They even drain easily when wet! - Bleeding Isnt Cool We love to hit it hard in the gym but dont forget what youre around. Staph infections can plague gym-goers. Stop grinding your shins up and stay safe. Sizing Information: They are meant to fit snugly, so if you don't mind a tight fit, be sure to order a size up. 10" or less around the widest point of your calf - S size 10" to 15" or more around the widest point of your calf - M size 15" or more around the widest point of your calf - L size