Features:

Made from durable water resistant nylon fabric,which is Light-weight Carrying and perfect for business traveling, weekend getaways, school, shopping and other outdoor activities in daily life, unisex style for both women and men. Big Capacity For Holding Your Laptop/Notebook/Ipad/Iphone, Pen, Keys, Wallet, Purse, Books, Clothes, Bottle And More, Offers An Ultra-Organized Way, The Main compartment is very roomy for big items, such as books, clothes, trousers, laptop and PC. Compartments offer a separated space for your iPhone, passport, pen, keys, wallet, watch, charger baby, MP3 and more. Two side mesh pockets provide a more sturdy and security load. Breathable and anti sweat shoulder straps, relax your shoulders and offer light weight carrying.
Dimensions(L): 29*17*48/11.4*6.7*18.9",Dimensions(M): 26*12*43/10.2*4.7*16.9"

How to wash the backpack?

Wash it with clean water in ordinary temperature.
DO NOT wash it with hot water and alkaline detergent.
Hang to dry and store in ventilated place instead of sun exposure.
Wash separately to avoid staining.