KYG Large Orthopaedic Dog beds, Dog Cushion, Egg Foam Inner Dog Bed, Dog Mattress with Waterproof Lining, Removable and Washable Dog Crate Bed, Blue-Grey. Egg Foam Crate: This orthopaedic dog bed features a 8 cm egg crate high-density foam that provides excellent support and evenly distributes the weight of your dog, reducing pressure on their joints - making it especially suitable for elderly dogs who have joint pain.