ERGONOMIC WATER PROOF FABRIC:Ergonomic design of S-shape padded shoulder straps and padding back design, made from high elastic and breathable sponge and fabric,reduce the burden of weight,protect the back and shoulder.High density waterproof Oxford fabric to protect your items from getting wet. LUGGAGE STRAP ANTI THEFT POCKET:The luggage strap makes the business backpack slide over luggage handle tube, free your hand and lower your shoulder stress while traveling.The back pocket can also be used to store passports and documents. USB PORT HEADPHONE JACK:With built in USB charging cable,this travel backpack offers you a more convenient way to charge your phone while walking.The headphone jack provides a way to listen to music. (Detachable USB cable design is better for cleaning backpack. GIFT WARP AVAILABLE:Suitable for a variety of occasion,for School Your best choice for the SCHOOL GRADUATION GIFTS and BACK TO SCHOOL Supplies.For Travel Perfect for international travel, weekend short trip getaways,airplane travel,outdoor hiking and camping.For Business Suitable for business backpack,laptop backpack,work backpack,charging backpack,usb backpack.