"Most hikers first head out on the trail with the borrowed, metal-frame backpack their dad used back in the 1980s and some old Timberland work boots strapped to their feet. But after grueling weeks and some mild scoliosis, a few decide to go lighter."

At less than 3.5 ounces, the Sawyer Squeeze is a fantastic solution for ultralight water filtration.  For more information and other suggestions, check out the rest of Gear Patrol's Ultralight Backpacking Buyer's Guide.