NOTE: Please measure your dog before purchase and refer to the size chart. And please so not let dogs wear the muzzle in a long time. FUNCTION: It helps dogs prevent from biting, barking and chewing when walks while allows dogs to drink and pant without restriction. ADJUSTABLE: The neck straps have an adjustable buckle, users can adjust the length freely, which is easy to wear and install. HUMANIZED DESIGN: Soft and gentle fabric muzzle construction makes sure that won't hurt dog's mouth. HIGH QUALITY: The dog muzzle is made of soft fabric material, which makes dogs feel comfortable and breathable.