Osprey Kestrel 48 Backpack - Small/Medium - Backpacking (Atlas Blue)If you need a pack that can handle scraping through sandstone canyons, scrambling up snow covered peaks, or hauling your gear for a day of trail work, the Kestrel can manage all that and more. For light weekends or big days out, the 48 liter Kestrel is a rucksack style pack made to haul heavy gear through challenging environments. KEY ATTRIBUTES DURABILITY Built to withstand every outdoor environment, from sandstone canyons to alder filled alpine