Prevue Pet Products SPVZZZ01 Zzz's Suede Sleep Sack for Ferret, Colors Vary Zzz's sleep sack are made with a cozy, super soft suede material It's great for both use inside or outside of a cage This sleep sack attaches easily to the cage with 4 clips and plush material invites pets to curl up inside for a short snooze or nighttime slumber Space saving, elevated design with hand wash and air dry Measures 17-1/2-inch length by 13-inch width