Wondering what makes this waterproof sack space saving? It's the special pressure release valve. After you buckle down the roll-top, trapping the air in and the water out, opening the pressure release valve allows you to squeeze out all the access air. This is great for compressing your cold weather clothes while keeping them dry. And with a total weight of only 5 ounces, you won't even know it's there. Each bag is constructed of double coated polyester, this lightweight sack has a volume capacity of 25 liters (~1,500 cubic inches). Shown with 15L and 5L for size comparison. This model is for the 25L only. Flat Dimensions: 16" x 33" Overall Weight: 7 oz. Availability: Usually ships the same business day. Space Saving Waterproof Sack - 25L PDS1633$27.95

Our Waterproof Rating System / Our Terms and Conditions / Soft Cases vs. Hard Cases / ROC Gear, Inc. / Return Policy At The Waterproof Store, we have a wide assortment of waterproof cases, bags, and backpacks, all centered around keeping your valuable gear dry during your most adventuresome expeditions. The Waterproof Store is a division of ROC Gear, Inc., your online specialty gear supplier. In case you need other outdoor gear, be sure to check out our other specialty sites at www.rocgear.com. ROC Gear is located at 5210 Palmero Ct., Suite 104, Buford, GA 30518. Phone: 678-318-3660.  E-mail: mail@rocgear.com. ©2005 The Waterproof Store.  All Rights Reserved.  Privacy Policy.