Doggie CoolCollar For Medium to Large Dogs - Keeps Your Doggie Cool for Hours! Lightweight, Safe, Cool Vet-Recommended -The Only SAFE Dog Cooling Collar Fill with Ice and/or Cool Pax for Safe cooling Adjustable strap - Fits dog neck sizes 13-19 inches Wear Year Round as a Reflective Collar - Bright Visible Reflective Stripes Dog Safe| Non-Toxic Gel & Materials