Arctic Shield Waterproof Kennel Pads -Constructed with Retain heat retention technology that radiates the dog's body heat back to their body, keeping them warm and comfortable. Heavy-duty polyester shell with polyurethane backingWaterproof fabricHeavy-duty embossed PVC non-skid bottomHanging loop for easy storage or cleaningDrainage holeSizes:Medium: 24" x 16" x 1/2"Large: 30" x 18" x 1/2"X-Large: 32" x 22" x 1/2"