Excellent 4-layer material: super soft fleece surface for ultimate comfort. High density super absorbent middle layer. Waterproof and breathable PUL inner layer. 100% polyester knitted fabric with silica gel bottom non-slip. MACHINE WASHABLE: Our guinea pig cage liner is specially designed and can be cleaned with a washing machine. It is not necessary to clean dirty objects by hand. Add vinegar as needed to help minimize smells. SUPER ABSORPTION AND ODER CONTROL: The thickened high-density water-absorbent layer can trap more water, prevent urine extravasation, and provide dry protection at night. Replace them when they are cleaned. Each cushion measures 60cm*45cm, mainly suitable for small and medium sized guinea pig cages. MULTI-PURPOSE & PREMIUM QUALITY: Be popular with guinea pigs, rats, hamsters, hedgehogs, chinchillas, ferrets, bunnies, rabbits, etc. A safe, effective and hygienic way to keep your cage clean. .