ALASKA BEAR - Natural Silk Sleeping Bag Liner Cocoon-Style Travel Sheet Sleep Sack with Built-in Pillowcase 100 percent pure premium long strand Mulberry Silk Breathable and moisture wicking, silk allows for a natural vapor balance. Comfortably fits most campers up to 6 feet tall Responds well to changing temperatures, will add warmth in the cold yet feel cool and soothing on a warm night, suitable for camping/backpacking/hiking, and for use in youth hostels, trains or anywhere else you might travel Helps protect against bed bugs, dust mites, allergens, harsh detergents and unclean bedding. Also you can use this versatile travel liner inside your sleeping bag to keep it clean, or use as a stand-alone sleep cover in warm climates Double stitching and reinforced gussets for long-lasting durability. Fine yarn and a special weaving technique make our high quality silk a very lightweight and durable fabric There is a 28 inch opening on top of the left side for you to SLIDE into the liner. Though it is made to open on the left, you can actually choose the side you wish to open and close the liner SIMPLY BY FLIPPING IT OVER.