They are fluffy and have no sense of pressure, so your pet will not feel cramped when sleeping in them. The beds are double filled with PP cotton, which provides soft rebound and helps to reduce pet stress and improve their sleep quality. Burrow soft dog beds are a type of dog bed that is designed to provide dogs with a safe and cozy place to sleep and relax. These beds are typically made from soft, plush materials and have a covered top or sides that create a cave-like environment for dogs to burrow into.