This Pet Comfort Gel Cooling Mat keeps your pets cool by creating a lower temperature than your pet’s body temperature. Chilly Mats fit any size pet to keep four-legged friends comfy, indoors or out. Soft, puncture-resistant, and durable mats also provide cooling therapy for older pets suffering joint pain. Your pets’ body heat may cause the mat to warm over time. If warming occurs, remove it from pet and the ambient air will cool and recharge the chilly mat. No need to freeze or chill!