When it comes to durability and comfort trust Coleman®. Each classic dog bed is made with tough polyoxford and cozy fleece and is available in different sizes to fit any dog. The cover is 100% washable and easily slides on and off for effortless cleaning. Specifications: Washable easy-on, easy-off cover. Cover is constructed of tough polyoxford & cozy fleece. Round Air Bed. Size: MEDIUM For pets up to 45 pounds. Bed is 30" x 3.5 thick. LARGE For pets 45-75 pounds. Bed is 40" x 3.5 thick. X-LARGE For pets 75 pounds and up. Bed is 50" x 3.5 thick. Usually leaves our warehouse in 1 - 3 business days.