The Ultimate Direction Fastpack 40 lets you move fast and light on the trail, boasting a durable design with sliding rail sternum straps and height-adjustable T-hook waistbelt. Uniquely fitting like a vest with water bottles up front, yet distributing weight like a pack, it offers ample space for trail running essentials alongside optimum comfort features. Plus, Infiknit™ and FastFlow technology increase the backpanel's breathability and moisture wicking so you remain cool and dry. Finished with dedicated external storage, a roll-top opening and a full-side external zipper for easy access to anything inside. Specifications Volume: 40.0L Weight: 0.715kg