Inner bag. Marimekko unikko pattern. Strong material. Stains are easily removed with damp wash cloth. 100 liter EPS. Dirt and moisture repellent. Easy cleaning with lukewarm water and neutral soap. According to EU norm product safety. Very flexible and high quality material. Six months guarantee. Made from 100% Nylon with PVC coating. Small: 32 in. L x 24 in. W ( 8 lbs.). Large: 48 in. L x 32 in. W ( 14 lbs. ) Fatboy "Animal Rights" also applies to dogs and dogs everywhere are now moving from dog houses, in with the family and into Fatboys.