As one of its daily deals, Woot offers the Yukon Outfitters Switchback Sling Pack in Black for $24.99 plus $5 for shipping. That's $35 off list and the lowest price we could find. It features adjustable straps, a hydration bladder pocket, and measures 20" x 14" x 7".

Note: Woot also offers the Yukon Outfitters Alpha Backpack in Olive Drab or Earth for $34.99 plus $5 for shipping. That's the lowest total price we could find by $9. It features zippered pockets, a laptop sleeve, and measures 21" x 11" x 13". Both deals end today.