Features--Stuffed quick rebound PP cotton provides comfort and softness--Waterproof bottom, moisture proof and easy to clean.--Skin-friendly material, creating a warm place for your pet. --The round shape is great for pets to curl up and snuggle down--The padded pillow offers relief for stiff joints and tired musclesSize:small: diameter:25cm, for small pets up to 1.5kg.Large: diameter:37cm, for cats and small dogs up to 5kg.