REI Garage offers the Chrome Bravo 2.0 20-Liter 15" Laptop Backpack in Brick/Black for $111.73 with free shipping. That's the lowest price we could find now by $16 (most retailers charge $160 or more), although we saw it in a different color for $31 less last July. It features a padded sleeve that fits laptops up to 15", waterproof main and front compartments, roll-top closure, foam back panel, cross-compression straps, sternum strap, and adjustable shoulder straps.

Want a different color? REI direct offers it in Black or Indigo for $119.93 with free shipping.