Sweet Closet Detachable Windproof Comfortable Hiding Burger Style Bed for Pet Cat - Light Brown + White (S) Lovely flip cover design looks like a burger bun or shell, unique and beautiful. There is a button on both sides for easily to remove. Made of high quality cotton velveteen material, is not wool, not ball. It provides your pet a healthy and comfortable nest. The base made of oxford cloth, anti-slip and waterproof, provides more protection for your pet.