Foam Mattress Dog Bed. Featuring deep convoluted (egg crate) style foam core this pet bed soothes pressure points and supports joints so your pet can enjoy a deeper more restorative sleep. The Jumbo Plus option for larger breeds features solid slab orthopedic foam for greater support and comfort. The plush faux fur sleep surface is soft on noses and paws. Easy step-on mat design for smaller older or disabled pets.