If you're going big, you need to haul some stuff. CamelBak's Ultra 10 Run Vest carries the water, fuel and gear you need when you're out there on your own. The pack weighs just over a pound, and has room to store a jacket and other essentials, enough for a day hike, even. The wide, adjustable shoulder straps help the Ultra fit snugly so it stays in place while giving you full freedom of movement. These straps also have easily-accessible pockets so you can grab food on the fly. And, CamelBak's awesome 70-ounce Antidote reservoir is included.