1.DURABILITY AND STRENGTH In order to increase the tensile strength of the product, is constructed of a single piece of rip-stop nylon. Those buckles are made from ecofriendly plastic. The metal D ring is chrome coated to add durability.. 2.Adjustable CollarsOur Breakaway Cat Collars adjustable S adjust 23-35CM , M adjustment 27-40CM , fit for small puppies, kitten, all most kinds cats, bunnies etc.. 3.High Quality MaterialsWe use the highest quality nylon in the market, hand-made, to ensure the quality of products and comfort in use. . 4.Safety Breakaway BuckleBuckle snaps open under pressure automatically, a guarantee for your cat being fabulous and safe under any situation. . 5.SKIN FRIENDLY Soft cotton cloth and fine hand-made, more care for the cat, effectively prevent your fur friend from allergy, neck strangulation or cutting. Durable and easy to clean.