Wewill via Amazon offers the Bsisme 15.6" Laptop Backpack for $28.99. Coupon code "KX4HHN92" cuts it to $20.29. With free shipping, that's the lowest price we could find by about $17. It has a USB / headphone hole, waterproof zipper, key fob hook, several pockets, adjustable straps, and a sleeve for laptops up to 15.6". Deal ends August 31.