WATERPROOF | YKK ZIPPER & WATERPROOF: YKK brand zipper make this bag last a long performance. Backpacks are more durable. Business laptop backpack made of high-density coated oxford fabric not only waterproof and resistant but also scratch-resistant. It can keep your laptops, clothes and important documents from drizzling but please don't let this bag exposed in a heavy rain. | ULTRA-LARGE CAPACITY LAPTOP BACKPACK: 12.2x6.3x18.9inch(L*W*H). Fits 15.6inch laptop. ★Structure: Large capacity main bag: store books, clothing, headphones, etc .; Open the main bag: store iPad, wallet, etc .; Front layer bag * 2: store mobile phone, wallet, etc .; Wet separation side bag * 2: Store rain umbrella, water cup, etc .; Shoulder strap card bag, storage card, etc. Suitable for business travel, college attendance, school commute, daily work and weekend trip. | USB CHARGING PORT & LUGGAGE BELT: With built in USB charging port outside and built in charging cable inside, this backpack offers you a convenient way to charge your phone while walking. （POWER BANK IS NOT INCLUDED.）Back luggage strap allows backpack to slide over the luggage tube, secure your backpack in place, provides a convenient way to carry the backpack and release your shoulder. | ERGONOMIC DESIGN: Padded Air cushion of the backside and shoulder strap,nicely cushioned and reduce the pressure effectively. The polyester lining is durable and soft, both preventing the fabric from fraying and protecting your computer from scratches. And together they protect your computer from accidents and drops. Adjustable buckle waist strap keep the backpack fixed on your body. Comfortable and decompression, not tired! | MULTIFUNCTION BUSINESS BACKPACK: The bag can be opeded freely 90 degree, can be used as school backpack, hiking daypack, camping bag, travel bag, diaper bag and work bag. Perfect for boys, girls, teens, adults, meet all your carry potential, roomy enough for travel accessories and school supplies.