Mountainsmith Zerk 40 Backpack Cycling Partial coverage rainfly provides great

Partial coverage rainfly provides great protection while allowing easy access and increased airflow

20lb weight capacity (optimized for a full-frame DSLR + telephoto lens)

the Python 15’s enable you to achieve the perfect hang when trees are further apart

WXS/S EF torso sizing 13

Zip down the built-in rain curtains on the Northern Breeze

Mountainsmith Zerk 40 Backpack Cycling Partial coverage rainfly provides greatCo designed with The Real Hiking Viking, a professional hike really long distances really quickly er, the ZERK 40 was born out of a need for an ultralight pack that can withstand the thousands of miles per year that The Real Hiking Viking already covers. We wanted to make sure that it would allow him to go farther, to hike longer, and to work more efficiently on the trail. Over the course of 2 years of development, the ZERK 40 went through 4