PERFECT DESIGN -- Breathable mesh design with tongue out, puppies can breathe. Triangular fixation, more firm and anti-dropping. Effectively prevent biting, mess, and chewing. HIGH QUALITY MATERIAL -- The dog muzzle is made of environmentally-friendly PVC material, has no odor, breathable and comfortable, and the edge fabric is soft and wear-resistant, and it has no harm to the skin. ADJUSTABLE STRAP -- The dog muzzle has an adjustable strap that allows you to adjust the strap to make it fit perfectly to keep it stable and make sure it won't be removed by your dog. SUITABLE FOR LONG SNOUT DOGS -- This secure muzzle is ergonomically designed for dogs with long snout. Suitable for Golden Retriever, Border Collie, German Shepherd Dog, Labradors, Corgi and other long snout dogs. SIZE SELECTION -- Please refer to the size chart of picture 6 to choose the suitable size according to the weight and mouth circumference of the dog. Any questions, contact us anytime.