These wonderful collars are designed to allow your dog to do what it does best, have fun and get dirty! Created from a special blend of polymers that won't absorb moisture, retain dirt, or harbor bacteria found in your dog's favorite play areas. NO MORE DOG COLLARS THAT SMELL LIKE AN OLD SPONGE! Just rinse under warm water, and you're ready for your next adventure. Matching leads are available and sold separately. Available in sizes to fit dogs with necks as tiny as 5", to BIG dogs with 21" necks.