Designed to hold your half or full-size crate securely, the SIDIO Crate Base Mat is made of a non-slip rubberized material. Your crate fits snugly into the Base Mat, which has a raised lip around the edge to help keep the mat from sliding off the bottom of the crate, or rather your crate from sliding off the mat. Once your crate is seated on the base mat, the mat's non-slip surface help prevent your crate from shifting or sliding on flat surfaces.