Uoobag Direct via Amazon offers the Uoobag Water Resistant 15.6" Laptop Backpack in Dark Grey for $36.99. Coupon code "PQNIXM3U" cuts it to $29.59. With free shipping, that's the lowest price we could find by $17. It fits laptops up to 15.6" and features dual zippers, accessory pockets, and adjustable straps.