Our BR Alexander Xcellence Tendon Boots in Goblin Green are created of polyurethane that is reinforced with a synthetic impact zone at the back. This feature truly provides optimum protection of the delicate tendons. The shock-absorbing lining crafted of 5mm neoprene and folded back at the edges for a refined, classic look. At the top of the boot, you'll find an anatomic cut-out for top comfort. Additionally, features like two strong, doubled over Velcro closures with double layered elastic insert straps give extra security throughout your training ride.