Hiking Backpack - 40L Large Capacity Waterproof Outdoor Hiking Backpack Traveling Daypack School Backpacks, Black MORE COMFORTABLE: Thickened & widened breathable, adjustable shoulder strap,chest strap and waist strap with spongy cushion, make it more comfortable and release pressure of shoulder, spongy cushion back padded make it ventilate, your backside feel more desiccative and comfortable. LARGE SIZE: 21.65 inch height, 12.60 inch long and 7.87 inch wide. Big enough, space saving, easy to carry your necessary, perfect for outdoor activities. MULTI-PURPOSE USES: This bag can used as suitcase/brief case when travelling. Two durable straps are in a hidden compartment to make this bag a backpack/rucksack/satchel. A detachable shoulder strap can easily turn the backpack into a messenger bag/crossbody bag/mail bag/shoulder bag. One bag offers at least three different ways of carrying. PREMIUM MATERIAL: Made of high quality waterproof Oxford, more sturdy and durable. Useful and Spacious with many pockets: Besides main pocket, back zippered pocket, there are secret protective compartment, phone pocket, notebook pocket with Velcro and pen pocket inside the bag.