For 15.6" laptops, the Promate Satchel Travel Laptop Backpack is a sleek, lightweight, water-resistant backpack with secure zippers in black. The Promate Satchel-BP is a lightweight, long-lasting backpack that is suitable for any office or school setting and can be used daily. Satchel-BP provides maximum comfort with its large capacity for up to 15.6" laptops, padded mesh shoulder straps, and polyester-lined interior.