A FAVORITE FOR MOVING FAST AND LIGHT IN THE BACKCOUNTRY 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 our roots, it uniquely fits like a vest with water bottles up front, but distributes weight like a pack. We gave it an upgrade with Infiknit™ and FastFlow technology to increase the backpanel'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 access to anything inside. FEATURES Large front storage for water, phone, maps, glasses, or food Unique zip-down main compartment for total access to gear Roll-top closure expands or compresses to secure varying capacities Large external stretch mesh pockets for quick access Sliding rail sternum straps Removable and height-adjustable T-hook waistbelt for heavier loads Easy access pocket with keyfob MonoRip Mesh is very strong, but extremely breathable. Water bottles not included SPECS Volume: 2440.95 in3 / 40.0L Height: 19.5" / 49.5 cm Width: 11.0" / 27.9 cm Length: 7.8" / 19.7 cm Weight: 1.58 lbs. / 0.715 kg Sizing at Chest: SM/MD: 26 - 39 in / 66 - 99 cm MD/LG: 36 - 48 in / 91.5 - 122 cm Maximum Torso Length Sizing (measure at the high point at top of shoulder down to the natural waist): SM/MD: 17 in / 43 cm MD/LG: 18.5 in / 47 cm MATERIALS 100% polyester