Mountainsmith Zerk 40 Liter Backpack zoom in


Mountainsmith Zerk 40 Liter Backpack

Countless hours, thousands of miles, a hundred beers, and one giant beard later and the folks at Mountainsmith® are proud to introduce the Zerk™ 40. Co-designed with The Real Hiking Viking, a renowned thru-hiker with thousands of hiking miles under his belt, the Zerk 40 pack stands alone as the ideal combination of weight, durability, comfort and accessibility.

  • Large main compartment
  • Roll top closure with side compression SR buckles; opposing SR buckles for self-closing roll top
  • Side compression straps for securing load throughout entire pack
  • Large side water bottle pockets with angled opening to easily remove and insert items while on-the-go
  • Expansive front mesh pocket for hauling bulky gear
  • Large mesh side stash pockets with angled opening for easy reach
  • Reflective screen printing and cord loops for low light visibility
  • Front cord loops can be configured with included bungee cord 
  • Removable interior laser cut frame sheet (EVA Atilon) allows for rigidity and airflow
  • Extra wide shoulder straps with adjustable sternum strap (includes safety whistle)
  • Four large mesh front pockets on shoulder straps (two per side)
  • EVA foam padded shoulder straps
  • Removable bear canister and accessory over-top webbing straps with SR buckle closure
  • Front panel bungee attachment system
  • Removable 1.5" waistbelt
  • Color: Phantom
  • Materials: 210D Extreema™ recycled nylon ripstop (UHMPE), recycled 210d nylon SD oxford, nylon 100D x span 840D stretch mesh
  • Volume: 40 liters (with fully extended collar), 32 liters (with roll-top compressed)
  • Torso range: 16-19"
  • Dimensions: 18.5" x 11.75" x 5.75"
  • Waistbelt max: 48"
  • Capacity: Up to 30 lbs.
  • Weight: 1 lb. 13 oz. (with accessories), 1 lb. 11 oz. (without accessories)
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Based in the mountains of Colorado, Mountainsmith® came into being in the 1970's when a frustrated outdoorsman, Patrick Smith, felt that there had to be a better mountaineering pack out there. Turns out there wasn't, and thus, Mountainsmith was born.

The company has since evolved to offer a full line of high-quality, high-performance outdoor products. From sleeping bags to lumbar packs to their complete line of hauling systems, there is a Mountainsmith product to meet your every adventure need.

And, if you're inclined to take along man's best friend on your next adventure...there is even gear for him!
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Top 40 liters 1 lb. 13 oz. $219.95