Easy wash and care. Zip off bolster. Soft velvety micro fleece interior. Sturdy enough to hold the heaviest of cats. Easy installation. Made from polyester and cotton. 24 in. L x 14 in. W x 10 in. H (3.8 lbs.). K&H took the popular Kitty Sill to the next level and created both hooded and bolstered kitty sills. The hood offers security and privacy while still having a peek-a-boo window on the back side so your kitty can still see all the views to the outdoors. If your kitty wants to cuddle, they can have all the advantages of looking out the window and feeling the sunshine while having the security of a bolster.