This plush bed makes a great gift towards your furry friend and is extremely comfortable. This outer suff sack is meant to fit perfectly inside of your duvet, and is water resistant, protecting the inner duvet. This affordable Molly Mutt Armor Liner comes in several sizes, ranging from Small (22"x2 7"x4.75") to Medium/Large (27"x 36"x4.75") to Huge (36"x4 5"x4.75") to 20"Square(20" x 3 .75"). There are several sizes available for you to choose from, and this helps keeping your beloved furry friend's bed organized.