The pack is constructed from super-tough Cordura ripstop, with a waist belt and compression straps for a comfortable fit. Multiple ports for the drinks tube allows you to access your hydration in a variety of positions, ensuring that the tube won't be a distraction. On hot days, fast-paced activities are made more bearable with the Air Director ventilated back panel.Two-zipper clamshell main compartment openingSide-release buckles - quick release from shoulder harnessSide compression strapsD-rings and webbing loops - for tube managementMOLLE attachment system integrated to front of packTop webbing hanger loopAdjustable sternum strapMil Spec Antidote 3L low-profile baffled reservoirQuick LinkTM exit port and drink tube - clicks off for faster refilling with auto shut-offQL HydroLockTM Bite Valve - one-handed manual on/off flowAntidote air-light fillportInsulated drink tube cover - maintains water temperature and protects from harmful UV raysMaterials: 500D double-rip Cordura fabric front panel, gussets and shoulder harness front side / 420D high density nylon on shoulder harness back side and back panel / 10mm EVA foam shoulder harnessVolume: 37 litres + 3 litre reservoir