Our Harley orthopedic mattress offers your dog the rest they deserve, specially developed to ensure support for your pet's joints. Ideal for older dogs and more fragile breeds. Non-slip base. Size M and L are very useful for medium and large breeds. Available in gray tones that adapt to any environment. 100% polyester velvet cover. Interior made of orthopedic foam (one standard layer and another viscoelastic). Non-slip polyester base.