The backpack is made of high-density oxford cloth, waterproof and wear resistant. Multi-layer storage areas meet your different storage needs. Very light weight for carrying around, and it has USB port and back anti-theft pocket, more convenient and safer to go out. Features: Lightweight Waterproof Fabric: Made of high-density oxford cloth, waterproof and wear resistant. Soft air permeability padded back cushion shoulder straps, very lightweight for carrying around. Smooth and wear resistant zipper for long performance. Ergonomic Design: Backside breathable air cushion promotes air circulation and heat dissipation. Adjustable and breathable mesh shoulder straps with plentiful sponge passing help relieve the stress from your shoulder. Large-Capacity Multi-layer Space: Fit for 15.6' laptop and 11' tablet. 3 layers of main bag for scientific storage, you can store items by dividing them well. Designed For Small Items: Card pocket on the shoulder belt for you to keep transportation card or some change and backside anti-theft pockets for your valuable belongings. Convenient to take things by yourself while also preventing theft. External USB Port: External USB port allows you recharge your electronic devices at anytime, free your hands from power-bank. Multi-Carrying Way: It can use as a carry on backpack in daily life. The soft top-handle allows this bag convert into a handbag. A luggage belt on the backside makes it fixed on a suitcase for easier carrying, perfect for business traveling. Specifications: Brand: MARK RYDEN Model: MR9008 Material: Oxford Fabric Color: Black Opening Model: Zipper Style: Business Shoulder Strap: 2 Capacity: Max. 20L Function: Waterproof, Breathable, Wear-Resistant, Anti-Theft, Load Shedding, Anti-Knock Item Size: 450 * 300 * 100mm / 17.72 * 11.81 * 3.94in Package Size: 450 * 300 * 50mm / 17.72 * 11.81 * 1.97in Package Weight: 900g / 31.75ounces Package List: 1 * Backpack