Offered in 4 sizes to fit Vari Kennel crates, Zentek introduces pads for the comfort of your dog while in a crate. Containing a phase change material  which provides a safe crate temperature . Used by professional handlers and dog owners at shows for 5 years.! This pad will cool the inside of the crate in the summer, yet keep the dog warm in the winter. The surface is a coated ( but breathable) ripstop( same as the dog coats)  that does not collect your dogs’ hair. A cooling pad in the summer. In the winter, warms your dog,but repels mud and water. The small mats weigh only 6 OZ.Perect to fold up and travel!  The perfect answer for dogs that are shipped in Cargo on the airlines.