Wake&Wag 41 by 37 by 3.5-Inch Dog Bed Tough, durable innerspring made from a soft, flexible engineered plastic formed into patented shapes for superior cushioning Born from technology designed for the United States military Supportive and responsive innerspring handles shifting without sagging or instability Features a machine-washable cover and one-piece odor and dirt resistant innerspring that is easy for you to clean Crafted to maintain its shape and an integrated handle makes it easy to move, stow and transport