The Sea to Summits 100 Premium Cotton Liner sheets are the economical choice for the price conscious traveler. They use a durable, high thread-count fabric that is as comfortable and easy to care for as your bed sheets at home. Their storage sack has a mesh back. Available in the following size options: Standard Rectangle, Long Rectangle, Double, Mummy Shape, and Traveler with a pillow insert. Traveler model is Hostel Approved.