SUPER SOFT short velvet + high precision PP cotton filling,super soft and cozy thick materials,sturdy in it's structure,stitching craftsmanship will keep this bed looking great for years to come.it's very fit for guinea pig,chinchilla, hedgehog,rabbit,hamsters,breaded dragon,rat,ferret,squirrel and other similar sized small animal 3 SIZE OPTIONSSmall is fit for a baby guinea pig (Weigh no more than 1 pound); Large is fit for a young guinea pig (Weigh no more than 1.8 pounds); X-Large is fit for a larger animal or two adults guinea pig to share space ( The total weight does not exceed 3.8 pounds). We recommend X-Large, pets grow fast and they like to roll and play in spacious spaces HIDEOUT SPACECushion keeps the guinea pig warm and you can pull out for more space.Hideout design makes them feel safe, there is plenty of room in it to curl up and nap.it's fun pattern and adorable cartoon shapes,it would make a really great gift USEFUL FUNCTIONSopening is shaped in a way for small pets to easily find their way into itthe non-slip bottom design is helpful when pet tries to push his bedIts also very convenient to carry or folds them in EASY TO CLEANThe pillowcase can be removed and washed separately, and the bed is also suitable for machine washing(Must use a laundry bag, otherwise it will be easily damaged )