Youll find the Osprey Manta AG 28 Hydration Daypack to be ideal for a day hike. The Anti Gravity AG suspension systemcombination of LightWire frame, mesh backpanel, BioStretch shoulder harness and AG hipbeltdistributes weight to keep you comfortable no matter how far you roam. Dual upper and lower compression straps help stabilize the load and provide add on storage options if you have extra bulky gear. To stay hydrated, a Hydraulics LT 2.5L reservoir is included. Direct zip access hydration compartment Hydraulics LT 2.5L reservoir included. Anti Gravity AG suspension system features 3mm LightWire peripheral frame that tensions the mesh and transfers the load from harness to hipbelt. Anti Gravity Airspeed backpanel and hipbelt 3D tensioned mesh comfortably wraps and conforms to the body and provides excellent ventilation. BioStretch harness with mesh covered, die cut foam that provides an active and contouring fit and ventilation. Dual upper and lower compression straps. Stow on the Go trekking pole attachement. Panel access to main compartment with internal mesh pocket. Heat embossed scratch free zippered slash pocket. Helmet attachment loop. Front panel stretch mesh pocket. Blinker light attachment. Integrated raincover. Magnetic sternum strap bite valve attachment. Dual access side stretch mesh pockets. Dual zippered hipbelt pockets. Large zippered front panel pocket with internal mesh pockets.