The Seeker 15 Liter is the ultimate all-season adventure mountain biking backpack whether single day or multiday. This weatherproof pack keeps your gear dry through the winter snow or spring rain showers thanks to the rolltop design and weather-resistant coating. When the heat turns up, you'll appreciate the cooling effect of the ventilated air suspension back panel and the breathable ergonomic shoulder straps. The 3-liter lower Hydrapak lumbar reservoir keeps water weight low on your back to maintain an overall lower center of gravity. This well-thought out pack features plenty of organization including spine protection compatibility, deployable helmet carry, side access pockets, and plenty of easy-access stash pockets to get at your goods in motion or at trail's end. Adventures are messy. If your Dakine bag gets dirty, it is recommended to hand wash it with mild soap, cold water and a soft bristle brush. If hand washing is not going to do the trick, use a front loader washing machine. Dimensions are 915 cubic inches, 19 x 12 x 8'' (48 x 30 x 20cm), 2.8 lbs (1.27kg). Material: Nylon Ripstop.