FurHaven Pet Products Southwest Kilim Orthopedic Deluxe Chaise Lounge Pet Bed for Dogs & Cats - Boulder Gray, Medium

Not like a "real" mattress--more like a foam, "egg crate" style--But, very nice, and my large dog LOVES it. He is old, and has a lot of pain, arthritis, and trouble, when getting up and down, walking, etc...So, putting the bed on the floor was perfect for him. He can walk right onto it, and lay however he wants, and even uses the pillow sides, for his head! He arranges his blankets, and gets very cozy and comfortable, and it's even helping his pain, because he's not on a hard floor, or, trying to jump onto a bed, or couch, which can cause them to hurt themselves. I wish I had bought this years ago, but, it is definitely worth the money!! And, I will be buying another one, if this one wears out, in time. ( So far, this has held it's shape, and has stayed thick, and comfortable!)