Made of sofe leather material, extremely tough, lightweight and durable, and comfortable to touch. Its adjustable on both the side strap and bottom straps underneath the mouth, can be widened or narrowed if needed. There is a loop which attaches to the dogs collar that you put the strap that goes around the head through to help it stay on, so your dog should have a sturdy collar in order for the muzzle to stay secure Air holes design, it is breathable when putting on, and it also allows the dog to open his mouth enough to eat/drink/pant, also still prevents biting. This Muzzle is only suitable for dogs with long snout. Not for breeds such as pit bull. Its necessary for your dog to get the right size. Please follow our size map and measure your dogs snout to pick the most fit size! Specification: Material: Leather Size M: snout:19-22cm/7.5-8.7inch, mouth:23-27cm/9.1-10.6inch, neck:24-36cm/9.4-14.2inch, suitable for pet 10-25kg Size L: snout:23-26cm/9.1-10.2inch, mouth:29-33cm/11.4-13inch, neck:31-40cm/12.2-15.7inch, suitable for pet 22.5-37.5kg Size XL: snout:24-28cm/9.4-11inch, mouth:30-35cm/11.8-13.8inch, neck:38-49cm/15-19.3inchm suitable for pet 35-55kg Package Includes: 1 Piece Dog Muzzle