The bolster is covered with an attractive, poly/cotton kitty print. The inside is lined with soft velvety microfleece. The bolster zips off and can convert into a plush kitty sill. 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. Zip off bolster Soft velvety microfleece interior Easy installation, no tools required Sturdy enough to hold the heaviest of cats Easy wash and care