Alps Mountaineering Contour 28 Day Pack - The bigger brother to the Contour 18, this 28L also offers a perfect and simple design combining lightweight and durable 200D nylon double ripstop fabric with our 3D mesh suspension straps for all-day comfort. The reverse direction lid provides easy access to the inside features, and the stretch side pockets are large enough for 1L Nalgene bottles. Need extra hydration options? This packs also offer a hydration bladder-compatible interior with a hose port. Features Lightweight and durable 200D nylon double ripstop fabric 3D mesh suspension straps Full-access zipper path with reverse direction lid Extra-large stretch side pockets fit 1L Nalgene bottles Hydration compatible Rain cover is neatly stowed in a zippered pocket on the bottom of the pack until needed