350 thread count, 100% cotton sateen. Twin is 68" x 90," Queen is 90" x 94," and King is 94" x 108." Has hidden zipper closure. Insert sold separately. Wash in cold water on a gentle cycle. Tumble dry low and remove from the dryer as soon as possible to keep from wrinkling. Although completely unnecessary, a quick ironing session always makes for a crisp and inviting bed.