Clear Plastic MuzzleMade from durable Polyethylene Double cap rivet construction Felt padding for nose Made for extended wear With or without head strap [split] The Redline K 9 Clear Plastic Muzzle is designed to be worn for extended periods of time without inhibiting the dog's breathing, barking, panting or stress responses. Made from a durable Polyethylene and constructed with double cap rivets to ensure the muzzle is as strong as it is functional.