Going for a long run? Camelbak's Marathoner Run Vest carries what you need. It weighs less than a pound and has enough room to store a jacket and other essentials. The wide, adjustable shoulder straps help the Marathoner fit snugly so it stays in place. These straps also boast easily-accessible pockets so you can grab food on the fly. And, CamelBak's awesome 70-ounce Antidote reservoir is included for hands-free hydration.