Eastern Mountain Sports offers the Osprey Packs Atmos 50 Backpack in Graphite Grey or Glacier Blue for $146.96. Coupon code "SAVEMORE" cuts it to $121.96. That's the lowest total price we could find by $28, although we saw it for $4 less five days ago. It features an adjustable shoulder harness, AirSpeed suspension, removable sleeping pad straps, zippered sleeping bag compartment, dual ice tool loops, bungee tool tieoffs, hydration sleeve, removable top pocket, and dual vertical front zippered pockets. It's available in sizes S to L, but not in all size/color combinations.

Also available is the Osprey Packs Atmos 65 Backpackin Graphite Grey, Glacier Blue, or Oxide Red for $174.96 before the above coupon code, $149.96 after. With free shipping, that's the lowest total price we could find by $29. It's available in sizes S and M, but not in all size/color combinations.

The free shipping option has an estimated delivery time of two to 10 days, but if you need to ensure delivery before December 25, you can opt for 2-day shipping, which adds $19.99.