A foam bottom jacquard nylon material, product durable. 2, before the rate increase double hidden zipper design embroidery LOGO. 3, nominative layer burglar-proof zipper match. 4, free expansion within the nominative layer shock liner designed to hold 12.1 "-15.4" laptop, do not worry about the liner is too big too small annoyance. 5, increase diversion breathable ergonomic design, back-up and comfortable, not Le shoulders, waist has a good protective effect 6,40KGS super load back button above, many parts of the force reinforcement, do not worry about broken baby. 7, with the top waterproof nylon fabric, and for your baby more care Wahoo.