This orthopedic Furhaven Orthopedic Mat Convertible Sherpa Panel Water-Resistant Outdoor Traditional Foam Mattress Pet Dog Bed has it all! Innovative "convertible" design features water-resistant base bed and removable top panel - perfect for outdoor use, dog houses, vehicles, garages, porch, and lanais! Water-resistant base pet bed is manufactured with a coated polycanvas fabric to help protect the filling from weather and moisture. A snuggly-soft sherpa top panel zips on and off to keep your pet cozy on colder days. Don't need the top panel or just want to wash up real quick? Simply unzip to remove! Top panel also acts a pocket for cooling or heating pads! Egg-crate foam core provides orthopedic support of joints and soothes pressure points leading to a deeper, more restorative sleep cycle. Low profile, step-on design for easy access by older or disabled pets.