Walmart offers the Ozark Trail 40-Liter Crestone Backpack in Black for $24.53. Opt for in-store pickup to dodge the $5.99 shipping charge. That's the lowest price we could find by $13, although we saw it for $5 less a year ago. It features front drop-in pockets, two side mesh pockets, padded back panel and shoulder straps, and adjustable sternum straps.