FeaturesThe Exos 58 combines comfort and ventilation with a light weight for committed thru-hikes like the Appalachian Trail and Colorado TrailReduce pack weight by removing the top lid, sleeping pad straps and compression strapsFabric is made of 100% recycled materialsPFC/PFAS-free durable water repellent (DWR) finish helps moisture bead up on the surfaceRefined AirSpeed® suspension keeps you cool with maximum airflow between you and your pack, so each mile stays as comfortable as the firstAdjustable shoulder harness lets you get the right fitSternum strap features an integrated safety whistleStow-on-the-Go trekking pole attachment lets you quickly stow your poles whenever you need your hands free2 zippered hipbelt pockets keep essentials handyInternal hydration sleeve with center-back hose port stores your water reservoir (reservoir not included)Removable, floating lid has zippered pockets on top and under it; when removed, the integrated FlapJacket under the lid protects your gearFront stretch-mesh pocket stashes rainwear and other gear you need throughout the day2 dual-access stretch-mesh side pockets let you quickly grab your water bottle, snacks and essentialsRemovable side compression straps tighten your load to keep it close to your body and cinch up extra volumeRemovable straps on the bottom of the pack let you attach an oversize sleeping pad (pad not included)Top-pocket web loop and web lash points for external gear attachmentDual ice axe loops with bungee tie-off Technical SpecsBest Use Backpacking Frame Type Internal Frame Gear Capacity (L) S/M: 58 liters L/XL: 61 liters Gear Capacity (cu. in.) S/M: 3,539 cubic inches L/XL: 3,722 cubic inches Weight S/M: 2 lbs. 13 oz. L/XL: 2 lbs. 15 oz. Adjustable Torso Length Yes Fits Torso Length (in.) S/M: 17-20.5 inches L/XL: 19.5-23 inches Fits Waist/Hips S/M: 28-50 inches L/XL: 30-50 inches Material(s) 100-denier high-tenacity recycled nylon ripstop; 400-denier high-tenacity recycled nylon (both bluesign® approved) Frame Material Alloy steel Number of Stays 1 peripheral hoop Reservoir Compatible Yes Suspended Mesh Back Panel Yes Pack Access Top Number of Exterior Pockets 6 + main compartment Raincover Included No Hipbelt Pockets Yes Dimensions S/M: 30 x 15 x 13 inches L/XL: 32 x 15 x 13 inches Gender Men's