Doggie CoolCollar for Large to Extra Large Dogs, Keeps Your Doggie Cool for Hours, Light-Weight, Safe, Cool Patented technology keeps collar at 58 degrees for optimum cooling Vet recommended - no direct contact with ice- avoids ice burns and chafing Cool your dog in three ways: Dry cooling + cooling with ice Made of machine washable non-toxic materials sewn in the USA The only cooling collar that is also reflective