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 OPTIONS: Small is fit for a baby guinea pig (Size 18*20*8 cm); Large is fit for a young guinea pig (Size 22*24*8 cm); X-Large is fit for a larger animal or two adults guinea pig to share space (Size 28*30*8 cm). We recommend X-Large, pets grow fast and they like to roll and play in spacious spaces. HIDEOUT SPACE: Cushion 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. USEFUL FUNCTIONS: Opening is shaped in a way for small pets to easily find their way into it. The non-slip bottom design is helpful when pet tries to push his bed. Its also very convenient to carry or folds them in. EASY TO CLEAN: The 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.)