The Promate Alpha-BP Travel Backpack features secure pockets, an adjustable padded strap up to 15.6", and is lightweight, water-resistant, and anti-theft. The Alpha-BP blends a fashionable design that complements any home or office setting with useful storage options. A large compartment that can accommodate up to 15.6" laptops, an inner material lined with polyester, and padded shoulder straps that provide maximum security are some of its key features.