The Uberlight CTF3 DrySack features a rolltop closure that helps make it waterproof. They are extremely lightweight, and feature a transparent color, so you can easily see it's contents, helping you stay organized. These drysacks are made with a fabric that is half the weight of other ultralight drysacks and have sew-free technology on the seams. Price varies by size. Colors assorted. Dimensions: XXS: 7L: 4.5" x 7" x 17" XS: 10L: 5" x 7.25" x 20" S: 13L: 5.25" x 7.75" x 21" M: 18L: 6" x 8.75" x 22.5" Weights: XXS: 7L: 15 grams XS: 10L: 17 grams S: 13L: 19 grams M: 18L: 21 grams