This waterproof technical day pack is loaded with more features than it appears. The 35L Cirrus Roll Top Backpack is ergonomically designed with lightweight, thoughtfully contoured padded shoulder straps. This bag features an adjustable roll-top closure with an external accessory pocket. The Cirrus Roll Top Backpack is the ideal pack for day hikes in the mountains. Product Features: 100% Waterproof Ultrasonic Welded Seams, Durable Reinforced PVC Fabric, Roll-Top Closure with Adjustable Straps, Ergonomic Adjustable Shoulder and Sternum Strap, Large Waterproof Zipper Pocket, Contrast Zipper and Webbing, Dimensions: 20"H x 12.5"W x 7.5"D (rolled) / 27"H x 12.5"W x 7.5"D (unrolled), Volume: 35 Liters/2135 Cubic Inches, 100% PVC. Colours: Bold Red/Black, Black/Black, Ocean Blue/Black