Large capacity size： 11.81 inches*9.45 inches*20.08 inches (30cm*24cm*51cm) (length*width*height) Preferred material：This multifunctional backpack is made of high-quality waterproof high-density oxford fabric, high-definition digital printing process, waterproof, scratch-resistant, abrasion-resistant, black polyester lining, soft decompression high-stretch sponge shoulder straps multifunctional design：Spacious when unfolded, multifunctional utility compartments help you organize things easily, including 1 front pocket/1 large compartment pocket/1 left pocket (water bottle or umbrella)/1 right pocket (with for wet towels) / 1 shoe pocket compartment, of which the large one contains 1 mesh compartment pocket, 1 notebook shock-absorbing compartment, 2 zipper pockets and 2 for iPhone, iPad, stationery, wallet, Slots for clothes, power banks and more Comfortable and convenient: The shoulder strap adopts a concealable design, the shoulder strap can be hidden when crossed diagonally, and the diagonal cross shoulder strap can be folded when carrying it by hand, which can meet a variety of wearing methods. Usage: Multifunctional backpack with adjustable long shoulder straps and hideable double shoulder straps, can be used as a backpack and crossbody luggage, suitable for gym bags, hiking luggage, outdoor travel bags, business travel bags, etc Outdoor Waterproof Backpack for Hiking Fishing and Camping Large CapacityMultifunctional Backpack