K&H Kitty Sill Bolster Deluxe Cat Window PerchK&H took the popular Kitty Sill to the next level and created a bolstered kitty sill. The bolster is covered with an attractive, poly/cotton kitty print. The bolster zips off and can convert into a plush kitty sill. The bolster offers extra support and comfort while your cat enjoys 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.