WiWU Alpha Double-layer handbag The WiWU Alpha double-layer handbag is made of waterproof nylon. It has a patented angle design that protects your laptop from shocks and falls during potential accidents. This laptop case is compatible with 15.6′′ laptops, MacBook and Ultrabook. It features a durable YKK zipper. It also features a waterproof, firm and scratch-resistant TPU handle (commonly used in car trailer ropes). It has a faux fur lining protection. It's made of water resistant material.