• PERFECT DAYPACK INCLUDING 2.0L BLADDER : This large capacity daypack with hydration insulation layer weights only 1.4 pounds (650g) unfilled which makes it a terrific companion for all your day-long outdoor adventures including running, cycling, hiking, fishing, etc. The bladder is made of EVA material and it's BPA-free , no taste 
• UNIQUE COMPARTMENT DESIGN: With two extra pockets on the wide waist straps you can put your phone or other valuables in and take them out freely. An open compartment is designed to conveniently store your quick-dry sweat towel, umbrella or hat. These unique designs make this pack more practical.
• HYDRATION INSULATION LAYER: With a hydration insulation layer made from high-quality aluminum foil that keeps liquid cool for up to 4 hours, (works great for 2.5L bladder), this daypack can also be used as a hydration backpack or portable cooler for both indoor and outdoor. There is even a clip on your right shoulder strap to help fix the hose of the bladder.