This lightweight Fastpack 40 has an optimal weight-to-capacity ratio for longer adventures over rugged terrain so you can move fast in the backcountry. True to Ultimate Direction's roots, it uniquely fits like a vest with water bottles up front, but distributes weight like a pack. UD gave it an upgrade with Infiknit™ and FastFlow technology to increase the back panel's breathability and moisture wicking. This do-it-all pack also has plenty of dedicated external storage, a roll-top opening and a full-side external zipper for easy to anything inside.
Sizing at Chest (Unisex):