1.Made of high-grade waterproof canvas and high quality hardware,inside polyester fabric. 2.Waterproof and abrasive fabric, fashion model curve,big capacity inside, exquisite workmanship, adjustable straps, suitable for different height of men, suitable for the 15 inch laptop, pad, mobile phone, clothes, wallet, books and other basic items. 3.Structure, main computer bag, phone bags, zipper bag, card bag. 4.Size:43*31*8cm,weight:900g. 5.Can used as a laptop backpack or a hand bag or a laotop briefcase after two belts hided in the back zipper pocket.