The Sea to Summit Expander Travel and Sleeping Bag Liner can be used on its own for hotel and hostel travel, or in combination with a sleeping bag while camping. The knitted poly-cotton material expands to twice its width for luxurious comfort and to accommodate different sleep positions. Machine wash with normal laundry soap, dry in dryer on low heat, to keep liner fresh and odor-free. The Sea to Summit Expander Travel and Sleeping Bag Liner extends the life of a sleeping bag by keeping it clean, and provides hygienic bedding and peace of mind for travelers. Available in five styles: Mummy (measures 82 x 36 inches, packs down to 6.5 x 3 x 5 inches, weighs 12 ounces); Rectangular (measures 73 x 36 inches, packs down to 6.5 x 3 x 5 inches, weighs 11 ounces); Rectangular-Long (measures 86 x 36 inches, packs down to 5 x 6.5 x 3.5 inches, weighs 13.4 ounces), Traveller w/Pillow Slip (measures 86 x 36 inches, packs down to 7 x 4 x 5 inches, weighs 13.4 ounces; pillow not included); Double (measures 73 x 73 inches, packs down to 7 x 5 x 4.5 inches, weighs 21.9 ounces). Storage case included. Sea to Summit products are guaranteed against defects in materials or workmanship for the lifetime of the product.