The PetSafe Universal Pet Bed Warmer will turn any pet bed into a therapeutic heated wellness bed! Simply slide the heated pad into your pet’s existing bed to help sooth stiff joints and sore muscles. The heated warmer features an easy to clean vinyl cover with a padded layer for extra comfort. The Pet Bed warmer consists of 5 layers: an easy to clean top cover, a padded layer, the controlled therapeutic heat element, proflex safety layer, and a sealed bottom cover. The Proflex safety layer prevents bunching and adds extra comfort within your pet’s bed. Low-Voltage controlled therapeutic heat Padded layer for extra comfort Double insulated chew resistant cord with AC adapter Uses similar amount of energy as a night light ETL listed and safety standard tested