Product Description : Amazon.comIdeal for long trails, the Quick Shot 70 Hydration Pack is able to hold a 2-liter water reservoir with ease as well as 478 cubic inches of additional supplies. The easy to use hydration design offers quick refills and hands-free hydration with an insulated water tube cover that prevents water from freezing in the tube in cold weather. Bike friendly features include a hinged front pocket for your helmet and a front zippered pocket for bicycle tools, accessories, or a media player. The pack's Vapel mesh Airflow padded back helps wick away moisture while the adjustable waist belt and adjustable sternum strap stabilize the load. A reflective loop holds a bike LED blinker for low light and after dark safety.Specifications:Dimensions: 17 x 11 x 5.25 inches Overall Capacity: 600 cubic inches Capacity with Reservoir Filled: 478 cubic inches Reservoir Capacity: 2 liters About High Sierra Sport Company:For over 25 years, High Sierra Sport Company has strived to provide the bags you need at a price you can afford. Specializing in adventure travel, High Sierra's dedication to function, design, and quality shines in each product. From athletes and outdoor enthusiasts, to students, travelers, and professionals, High Sierra's versatile, innovative products are sure to fit your needs. High Sierra Sport Company is the official supplier of bags to the U.S. Ski and Snowboarding teams, and its memberships include the Outdoor Industry Association and Sporting Goods Manufacturers Association (SGMA).Product Description : Let the trail go on forever. Our Quickshot 70 pack holds a 2-liter water reservoir with ease, promotes quick refills and hands-free hydration, and keeps you going with extras like a hinged front pocket for your helmet, another pocket for a CD or MP3 player. Insulated water tube cover prevents water from freezing in the tube. VAPEL? mesh AIRFLOW? padded back prevents moisture. Adjustable waist belt secures the pack while the adjustable sternum strap helps stabilize it. Reflective loop holds bike LED blinker for safety. For over 25 years, High Sierra Sport Company has strived to provide the bags you need at a price you can afford. Specializing in adventure travel, High Sierra's dedication to function, design, and quality shines in each product. From athletes and outdoor enthusiasts, to students, travelers, and professionals, High Sierra's versatile, innovative products are sure to fit your needs. High Sierra Sport Company is the official supplier of bags to the U.S. Ski and Snowboarding teams, and its memberships include the Outdoor Industry Association and Sporting Goods Manufacturers Association (SGMA). Got this pack to take on a hiking trip for my friend's bachelor weekend. It's a great great great hydration pack, and it had exactly what i needed it for. I absolutely loved the slide-lock reservoir and the hidden shoulder strap that the hose goes into. This was a major factor in my search for a pack, because i've used my friends and tried on other packs and the hose has always gotten in my way when it comes time to run and do other physical activities. Also the shoulder strap keeps the hose cool which helps when you need a quick burst of water, and dont want it to come out all hot and nasty.UPDATE: I lowered a star due to the terrible weave construction on the slidelock reservoir, which broke on me, spilling all the water into the backpack, my back and my shorts. I wanted a pack for hiking but what I was mostly concerned with is the water bladder itself. The bladder (2L) is awesome. I've had the ones that have the screw on lid - which are good, but a pain in the rear end to clean. This one has a slide locking mechanism on the top that you just slide the clip off and the entire top of the bladder is accessible for cleaning, it's freakin' sweet!The pack itself it excellent. Really heavy duty and I can fit quite a lot of things in it. My last day hike I was able to carry a large hardback book, a snack, my hammock, med kit, leather man, fire steel, iodine tablets...and the list goes on.I have zero complaints about this item. You shant be disappointed if you buy. It's a great pack for a great price. Most of the Camelbaks I've seen are double the price with less space, and IMHO, a terribly designed water bladder. Very pleased with amount of water it holds and storage. Pack is secure on mtb rides and can put some snacks, tool, keys, wallet, phone, towel, etc in there also. Get more storage if you don't fill up the bladder so I also use it sometimes just as a pack to take a few things with me to work or somewhere else. Great price for what you get.