The "Just Chillin" Cooling Inserts contain a special gel created to keep pets cool.  Simply put the insert in the refrigerator until cold and then slide it into the zippered pouch of any style K-9 Keeper Sleeper. Your pet will stay cool all day!  The gel within the inserts also "molds" to the pets body for EXTRA comfort and will soothe achy joints and gently massage pressure points as the pet moves about the bed.  Available in 6 sizes to fit each size K-9 Keeper Sleeper.