K&H Tan Kitty Crinkle Sack Cat HideawayThe Crinkle Sack is a fun place to hide, peek or just take a nap. The sack makes the noise of a paper bag that all kitties love. The inside is lined with plush lamb's wool Sherpa. The outside is covered in poly/cotton for easy washing. Cats will play and be amused for hours and this will become one of their favorite hiding places. With built-in noisy walls, all cats find it as irresistible as that paper grocery bag left on the floor.