Arc'teryx Men's Atom Jacket Black Fleece Wearing on the arm offers

Wearing on the arm offers our optical sensor an optimal amount of blood flow to gather heart rate data with accuracy equivalent to that of a traditional chest strap

Check out features made for comfort and convenience

A pure Arnitel® TPEE foam midsole allow for exceptional responsiveness

Waterproof GORE-TEX® technology

invisible barrier to protect your skin

Arc'teryx Men's Atom Jacket Black Fleece Wearing on the arm offersX000009561 002291 Everything you love about the Atom Hoody (minus the hood), the Atom Jacket is the layer you can count on to see you through multiple high output activities. Wear it solo for chilly forest hikes with windy summits, climbing at the crag and hanging at the campsite, or as a midlayer for touring and wet winter objectives. The Coreloft synthetic insulation stays warm even if you run into light weather, making it a better alternative to