Our dog leash is Made of high quality nylon, soft, durable, and our dog collar is made of polypropylene foam. Our dog collar is adjustable, and has a comfortable neck protector and it can't damage the dog's hair. The dog leash is super durable and strong. Our collar adjust range is 10 inches -20 inches, and our leash has a size of 4ft. Our dog collar and leash is super comfortable for your dog