YISMEET Lightweight Hydration Pouch Backpack with 2-Liter Water Reservoir Features & details ✓WILL FIT YOU PERFECTLY: Adjustable shoulder、waist/chest straps. Will fit chest sizes from teenagers/kids with 27" up to adults (men and women) with 50" chest size. The chest straps with 2 side buckle design makes sure it doesn't bounce when you move. Shoulder straps have buckle design in 2 sides,it fixed a straws and convenient water in different direction. ✓GOOD VOLUME: Includes storage compartments that will fit your clothes, iPad, phones 11" -12" laptops and even a DSL camera. For even more storage, good for your Outdoor Running / Cycling Bicycle Bike / Hiking / Climbing / Travel / Hik, Decorated with reflective strap, to ensure your safe during the night. ✓PREVENT SWEAT AND DURABLE: The main compartment is covered with our own diamond Rip Stop Nylon material which serves two functions. It is water and sweat resistant so your belongings stay dry. It is also durable reduces wear and tear so your pack lasts longer.Wide mesh straps and chest shock absorber reduce bounce. ✓REPLACEABLE 70 Oz. BLADDER: Includes a 2 Liter/70 Oz. BPA Free bladder which keeps you hydrated. It also keeps the water fairly cool. and includes a wide screw cap so you can add ice cubes for an even cooler drink. Enough to get you through a day of hiking, cycling, running or biking.