The product description 1, for example: Lab Bulldog, Golden Retriever, French Mastiff, Bulldog, 2. Material: The front of these collars is made of 100% full grain leather. The soft lining is made of specially treated soft PU leather, which is good for preventing suffocation and skin irritation. 3. The sturdy D-ring can withstand the strongest and strongest rivet dog collar. Stitches to increase strength and longevity Sharp points are effective when bitten by other dogs. 4. The metal eyelet is adjustable to keep the riveted leather dog collar at the right size