Features Hard shells with metal inserts on the knees ergonomically sporty fit Leather stretch over buttocks and knees elastic comfort inserts on groin, the houghs and calves to optimize freedom of movement connection zipper velcro for kneeslider calf width adjustment by a second zipper Safety SAS-TEC protectors on the hips and knees safety saems in accordance with ISO 4916 doubled material on the buttocks reflective elements Material robust 1.2 to 1.4 mm thick cow leather combined with elastic polyamide fabric breathable mesh lining with elastic inserts