This item is brand new, never used, pristine, and still has all the tags and protective plastic over the bite valve. I received it as a gift but I already have a hydration pack I'm happy with. It's a 10 liter pack containing an insulated 3 liter reservoir that keeps water cold for more than 4 hours. Adjustable shoulder, hip and sternum straps. Padded mesh back panel provides space between you and the pack for airflow and heat escape. Two zippered gear pockets in addition to the main compartment, which contains stretch pockets for gear. Magnetic clip keeps drinking hose in place and easy to access.