The 4 corners are slit to allow the pad to fit many different edges. The adjustable size makes this pad fit into many different crates. The topside of the crate pad is made from soft, inviting microfleece while the bottom has a "stay pet" non-slip fabric to keep the pad from bunching up in the crate. Simply throw the whole pad in the wash for easy cleaning and care. Self warming radiates heat back to your pet Corners are slit to allow perfect fit in any crate Soft microfleece top for comfort Easy wash and care Non-slip bottom for stability