Patagonia Critical Mass
Where to Buy
Here's what other sites are saying:
Patagonia's Critical Mass Pack carries the heavy, the awkwardly shaped and the diverse. With a slight trapezoidal shape and a streamlined design, it keeps the loads of a bike commute close to your back to preserve your dynamic mobility. The main compartment is covered by a flap and equipped with one drop pocket, one mesh pocket, one padded electronics pocket and three slots for pens.