Airbak Hydro-Tek HP2007 Nylon Hydration Backpack (Lime Green/Black) - Carry Up To 2 Liters of Water! Airbak Hydro-Tek HP2007 Nylon Hydration Backpack General Features: Lime Green and Black colors Wraps around the waist 2.0 Liter HydroPak Leak proof, easy fill opening Easy to clean drinking tube Lightweight, high performance nylon material Breathable lightweight airflow mesh with air bubbles Adjustable waist buckle strap to maximize load stability