COP® K9 Muzzle for Dogs Available sizes: XS, S, M, L A guide for sizing: XS = small Malinois S = Malinois M = Malinois, small shepherd dogs L = large shepherd dogs Material: Nylon Quick release buckle on strap. Sturdy construction, extra reinforcement in the front area. good ventilation makes it well suited for training and duty. 2 end keeper loops are included to fix the protruding ends of the strap