My dog is 13 years old Collie. He was diagnosed with arthritis and the veterinarian recommended us to get an orthopedic bed for joints relief. My dog liked so much this bed, he can stretch and turn around, get in and out with no difficulty, since there is no need to climb. I bought an XL size and is perfect for my dog. The cover has a zipper, is removable and washable. I am happy with this purchase.