ZORROO 15L Rucksack For Bike Bicycle Cycling Riding Running Camping Hiking Hiking Climbing Waterproof Outdoor Backpack Hydration Pack with FREE 2 Liter TPU Bladder Includes a 2 Liter/66 Oz. TPU FREE Bladder which keeps you hydrated. It also keeps the water fairly cool. Enough to get you through a day of Hiking, Cycling, Running or Biking Adjustable shoulder strap and waist strap to fit your need Includes storage compartments that will fit your clothes, iPad, phones 11" -12" laptops and even a DSL camera. For even more storage, the side pockets allows you to pack even more on your hike. The main compartment is covered with super light waterproof nylon material which serves two functions. It is water resistant so your belongings stay dry in light/medium rain. It is also durable reduces wear and tear so your pack lasts longer. Size: 42cm x23cm x17cm(Height x Width x Thickness)