Your silk garments will wear longer and pill less as the bags protect the item contained from getting pulled or stretched, and rubbing against other fabrics. * - Look after expensive fabrics in the wash * - Each bag features an easy to use and secure zipper closure * - Prolong the life of delicate clothing * - Material: Polyester Size: - For Pillowcases/accessories -- Cylindrical bra bags: 6.69"x5.91" - For Sleepwear/pillowcases -- Small Bags: 11.81"x15.75" - For Bedding -- Large bags: 19.69"x23.62"