Bucky  Utopia Neck Pillow With Buckybag,Emerald,One Size Cover: 75% Cotton 25% Polyester. Trim: 100% Polyester. Liner: 100% Polyester. Filling: 100% Buckwheat Hull Original buckwheat hull u pillow with a built in bucky bag to keep your pillow clean and conveniently at hand. bucky bag snaps on to the pillow for safe keeping. Elastic strap clips on to your carry on bag or luggage. Product is 12" x 13" Removable Machine Washable Cover And Carry Bag.