The Osprey Manta 30 is built to kep you hydrated on all-day adventures. This pack weighs a mere 2 lbs 9 oz (average) and has a lightweight, perforated hipbelt and harness for breathability. The Manta series features AirSpeed Suspension; a mesh back panel with stability provided by a LightWire Frame with ridge-foam backing. The Manta 30 has a roomy main compartment, a large front zippered pocket, with a small elastic outer pocket, and two zippered side pockets for organization of essentials. This hydration pack includes a 3 liter reservoir; other features include an integrated rain cover, an adjustable sternum strap and a Stow on the Go trekking pole attachment.