The OQQ Long Plush Comfy Calming & Self-Warming Bed for Cat & Dog is a raised rim design that provides its neck and head support, creating a sense of security. The bottom is made of high-quality fiber filler that keeps the bed warm and comfortable. The delicate edge is firm and durable, avoiding your puppy from digging into the stuffings. The bed is available in multiple sizes and colors, making it perfect for any sized pet.