I only put a dog on the main unit once with a plastic bag over it, and since the size didn't fit, I'm selling it. It comes with a cover. Main unit (beige) + cover (brown) This is a set for sale. - Brand: OneAid - Product Name: Relax Cushion - Size: M - Color: Main unit → Beige, Cover → Brown Manufacturer model number: oa5891942 [From the official website] We have prepared a bead cushion with colors that can be chosen to match your living space, so that you can use the posture support cushion used in animal hospitals for rehabilitation, massage, etc., more easily. It enables the dog to eat in a standing position, which helps prevent aspiration. The side cushions prevent lateral slippage and falling, and the wide head cushion firmly supports the head. Since it is a bead cushion, there is no need to worry about bedsores. It is a set product with a water-repellent cover that can be washed. Product Name: OneAid Relax Cushion Water-repellent Cover Set Brand: One Aid Material: Relax Cushion Fabric: Polyester, Filling: Expanded polystyrene, Cover: Nylon: 90%, Polyurethane: 10% Weight Capacity: Up to 11kg Size: W40 x 72 x 30 Country of Origin: Relax Cushion Main Unit: Japan, Cover: China How to attach the cover: Secure it to the main unit with the rubber on the bottom and Velcro. For medium-sized dogs Main unit: Beige, Cover: Brown Manufacturer: Aron Kasei Co., Ltd.