The Campmor Ultralight Vertical Compression Stuff Sack 5.5 in. x 18 in. is a durable, lightweight compression stuff sack made of 1.1 oz. silicone impregnated ripstop nylon. Compression stuff sacks are a must have, when you're trying to squeeze bulky synthetic-insulated sleeping bags into compact backpack sleeping bag compartments.Reduces pack size by 25-40%. 1.1 oz. silicone impregnated ripstop nylon construction. Four straps - two with side release buckles, two with ladder lock buckles. Webbing handle on the bottom to help remove your sleeping bag. Bag is hinged to the cap so the straps won't tangle. Wt. 3.8 oz. Size 5.5 in. x 18 in. Made in USA.