Whether you"re conquering the trails on two feet or two wheels, carry your extras and your fluids in the Osprey Syncro 15 Hydration Pack. This streamlined pack"s self-contained design scores with cyclists and hikers who are looking for lightweight, highly ventilated comfort.Airspeed suspension includes mesh back panel supported by LightWire frame with side vents that keep your back cool Biostretch ventilated harness featuers perforated EVA straps covered by soft, breathable spacer mesh for maximum breathability Lidlock helmet clip and blinker light attachment patch give you spots to attach essential safety equipment Zip front pocket includes organizer for tools, camera, pump, maps, and other essentials Hydraform reservoir is BPA- and PVC-free, and features an AquaGuard antimicrobial treatment to prevent growth of bacteria and mold Integral framesheet in reservoir prevents barreling, while a rigid handles allows for easy insertion and removal in the pack 180-degree pivot bite valve rotates on and off in either direction, and includes magnet that attaches to sternum strap Integrated high-visibility rain cover included Reflective details improve nighttime visibility Removable 20mm webbing waist strap keeps your load from bouncing around Product FeaturesMaterial: nylon ripstop (100D)Reservoir Volume: 3 LPockets: 1 front zippered, 1 small zip, 2 side large stretch meshWaist-Belt: yes, removableCompression Straps: Locking Bite Valve: yesWeight: [S/M] 1 lb 8 oz; [M/L] 1 lb 10 ozDimensions: Volume: [S/M] 854 cu in; [M/L] 915 cu inRecommended Use: cycling, hikingManufacturer Warranty: lifetime