One of the point of hiking is to clear your mind, not to create extra static with concerns over dehydration. Camelbak's classic Fourteener 20 Hydration Backpack will worry about your water supply so you can continue focusing on greater things. Its large three liter reservoir gets you three hours in any direction even on the hottest of days. Weighing in at a little over two pounds sans water and with 1040 cubic inches of extra storage space, the Fourteener specializes in hydration but maximizes your storage convenience as well. Because full day hikes require much more than just water, CamelBak fitted the Fourteener with multiple, easily accessed pockets for your sunglasses, extra water, hiking gear, tools, and most importantly, your mama's famous PBJ. When not fully stocked with goodies, this pack shrinks, by means of four compression straps, to reduce extra bulk on the trail. Come rain or shine, the Fourteener won't quit before you do diamond clarus, nylon, a DWR coating, and 1000 millimeters of PU coating all unite to create of force field impenetrable by rain. Seasonafter season, CamelBak's super scientists have been hard at work refining andperfecting the Antidote reservoir, the industry's most popular solution tohydration. At the turn of a cap a quarter turn to be exact, you can open orclose the reservoir, refilling and securing it again in seconds. Centerbaffling and a sleek design prevent your water from jostling about inside yourpack while running, hiking, or hitting the park. When not off exploring theworld, simply disconnect the tube using the Quick Link System and hang up theAntidote for proper drying or storage. Since last year, CamelBak's go toreservoir system has actually lost some weight, reducing bulk in the fill portand offering you that much more convenience.