PAMASE 2.5L Tactical Backpack Hydration with Bladder for Hiking Cycling Climbing Hunting Running - Black & Camo 2.5L Hydration bladder with 4.5cm wide filling opening nozzle allows easily to add ice cubes for cooler drink. Alternative useages for Hiking, Cycling, Climbing, Hunting, Running and other outdoor activities. Hydration Bladder is made of ultra-durable, leak resistant edible grade EVA in welded seams, non-toxic and taste free. 100% BPA free bite valve with anti-dust cap provides quick release and smooth drinking. Adjustable tighten chest/shoulder straps enhance comfort fit, ensuring the backpack hit in the right place avoiding swinging or moving. Compact and lightweight design fits for anyone from teenages to adults. Humanity mesh pocket securely stores snacks, keys, phones, bandanas and other EDC gadgets with the drawstring fixture.