Perfect design - breathable mesh design, tongue extended, allowing the puppy to breathe freely. Triangle fixed, more secure, more anti drop. Effectively prevent bites, confusion, and chewing. High quality material - The dog mouth is made of environmentally friendly PVC material, which is odorless, breathable and comfortable. The edge fabric is soft and wear-resistant, and does not harm the skin. Adjustable Strap - The dog's muzzle has an adjustable strap that you can adjust to fit perfectly to maintain stability and ensure that it will not be removed by your dog. Suitable for long snouted dogs - This safe muzzle is designed for long snouted dogs and is ergonomic. Suitable for Golden Retriever, Border Collie, German Shepherd, Labrador, Corgi, and other long snouted dogs. Size Selection - Please refer to the size chart in Figure 2 and choose the appropriate size based on the dog's weight and mouth circumference.