Come and Check Our Promo Solutions.This travel backpacks is made of high quality water resistant oxford cloth which Breathable and decompression carrying system, heat dissipation, ventilation, shock absorption . It's more comfortable carrying a heavy load, relieves the stress of your shoulder. Offering your back plenty of cushioned comfort.The external USB port allows you to charge your phone at anywhere and anytime . Suitable for office, school, outdoor, business and other occasions. Pls check inventory and detailed info with us before placing your orders.