
Fleece
Lined
Wind
Resistant
Men’s Base Layer
Bottom: Tested
By Customers
To -40°F
by the American Birkebeiner Ski Foundation®

More Warmth
Fewer Layers
Finally, men’s base layer bottoms with no bulky layers where you don’t need them. PolarJock® gives you total coverage plus complete freedom of movement and no overheating. This fleece lined base layer is wind resistant yet lightweight and comfortable. For cold-weather running, skiing, cycling, or working outside, get premium protection where it matters most.
How to Wear It
Wear your PolarJock® on its own as your only base layer bottom. Or, wear it under wind briefs, wind boxers, or long underwear for extra protection when and where you need it. Now dial in your layers to your activity and the conditions.
Do Whatever
Your Day Demands
All-Day Performance
Sub-Zero Protection for your most extreme adventures
Frostbite Prevention to eliminate extreme pain and permanent damage
Fleece Lined, Wind Resistant for breathable warmth in the toughest conditions
Premium Pouch Design for ample room combined with total coverage
Highly Durable for daily wear in any environment
All-Day Comfort
All Stretch Materials move with you for any sport, work, or activity
Minimal Design for a barely-there experience
Super Plush, No-Roll waistband and leg straps for next-to-skin comfort
Trim Fit and Feel for wearing under a racing kit and other minimal outer layers
“No-Bounce” Support for running, downhill skiing, snowboarding, and more
Winter Fat Biking in the Yukon, Canada.
Wore it in the February 2024 100-mile
Yukon Arctic Ultra. A key piece of equipment.
Fit and comfort was excellent.
Scott H. — Yukon, Canada
Super warm, comfortable and lightweight
for skiing and running. It cuts the wind without having to wear so many layers. And, it has
protected me from frostbite more than once!
Terry T. — Wisconsin
Your First Line of
Defense Against the
Coldest Conditions

Get Out and
Stay Out
Don’t let the cold hold you
back or cut your day short.

Wherever the
Cold Takes You
Cold mornings, deep powder, the steepest climbs, and miles of trail.
