High quality water-proof fabric, thick fabric with tear resistance, abrasion resistance, waterproof and strong features. If your bag gets wet by the rain, just dry it.

Great to know:

• Durable Material and Large Capacity: 600D Innovative Shining anti-tearing Water Resistant Polyester.
• Convenient Design: Includes External USB with built-in charging cable, card pocket on a strap and invisible rear storage pocket. Anti-Theft Hidden Zipper keeps your valuables safe
• Back Features: Rear Webbing can attach the backpack on suitcase. Weight balance design, breathable padded back panel, and S-Type shoulder straps provide ultra comfort experience
• Multifunctional Pockets: Three main compartments and more than 11 functional pockets offer you particular space for laptop, iPad, iPhone, books, keys, pens, cards, wallet, water bottle, clothing and more.