-Mildew-resistant poly fill. -Made with bonded poly fill to prevent bunching up in the wash. -Baffled to prevent shifting. -Fits most standard crates and kennels*. -Wash with cold water and tumble dry on low heat. Sizes: -X-Small: 13″ W x 19″ D. -Small: 18″ W x 24″ D. -Medium: 20″ W x 30″ D. -Large: 23″ W x 36″ D. * Please keep in mind that there are no standard dog kennel sizes. Bedding has been designed to accommodate the majority of crates.