Skip to product information
PolarJock® Cold-Weather Base Layer

Stay Warm Where It Counts®

$81.00
Free standard shipping worldwide

Targeted Protection Below the Belt

  • Stops cold where layering can leave a gap
  • Polartec® fleece lining for lightweight warmth
  • Wind-resistant, breathable, moisture-wicking
Free Standard Shipping Worldwide
60-Day Satisfaction Guarantee
Made in the U.S.
Size
Cold hits differently below the belt

You've felt it.

You're out for a run. Or skiing, hiking, working.

The cold hits.

You push through the pain or cut the day short.

PolarJock® was engineered to solve that.

Layers Have Evolved

Traditional base layers distribute warmth broadly across your core, hips, legs.

PolarJock® adds targeted protection where it matters most.

It's designed to work with your layering system, to complete it.

  • Precision warmth
  • Wind resistant, breathable, moisture wicking
  • All-day comfort and trim fit for training and work

Why Not Just Add More Layers

Because adding more layers to fix just one spot:

  • Adds unnecessary bulk
  • Restricts movement
  • Causes overheating
  • Bunches up and causes chafing

You have specialized gear for other extremities. Get precision gear for your privates.

Why Polartec Fleece®

Premium high-loft, insulating warmth, without bulk or overheating.

Breathable, moisture-wicking, next-to-skin comfort.

Lightweight. The PolarJock® weighs only 3 ounces / 85 grams.

Trusted in Cold
and Wind

RUN

“A key piece of equipment."

Scott H. — Yukon, Canada

"Cuts the wind without having to wear so many layers."

Terry T. — Wisconsin

"Fantastic for long training days in sub-zero temps!"

Larry F. — Minnesota

“Any time I’m working in the cold, and skiing."

Jason J. — Oregon

Bridge the Cold Gap

Good layering can still leave you cold.

Expect More from Layering

Bundle up all you want. The cold still finds its way in. That one spot.

PolarJock® is engineered to fix this.

Wear it alone or with another base layer to complete your cold-weather set-up.

Some Days Wind Briefs Aren't Enough

Guide Included

10-page field guide included with every order.

Shop Now
Stay Warm Where It Counts®


Product Features

THE BASICS:

  • Polartec® fleece lining with high-loft insulation for superior warmth that also lightweight.
  • Each finished product weighs only 3 ounces / 85 grams
  • Moisture wicking
  • Breathable
  • Wind resistant
  • Durable, comfortable, no-roll elastic


ALL-DAY PERFORMANCE:

  • Sub-Zero Protection: Warmth you can count on in extreme temps
  • Frostbite Prevention: Shields your most vulnerable zone
  • Premium Pouch Design: Room to move, insulation where it matters
  • Durable Construction: Built for daily use in demanding environments


ALL-DAY COMFORT:

  • Warmth without the Weight: No bulky layers, forget it’s even there
  • Flexible, All-Stretch Materials: Moves naturally with your body
  • No-Roll Waistband: Stays put under layers and during activity
  • Athletic Trim Fit: Works under race kits and workwear alike
  • No-Bounce Support: Ideal for running, skiing, cycling, and active movement
Sizing

PolarJock sizes are based on your waist size in inches / centimeters:

INCHES
Small
— 26-30 inch waist
Medium — 30-34 inch waist
Large — 34-38 inch waist
XL — 38-42 inch waist

CENTIMETERS
Small
— 66-76 cm waist
Medium — 76-86 cm waist
Large — 86-96 cm waist
XL — 96-106 cm waist

Materials

Polartec® Fleece Lining
100% premium Polartec® fleece, engineered for lightweight, cold-weather protection. The lofted structures in this fleece create and hold thermal air pockets to provide insulating warmth as well as optimal moisture-wicking and breathability.

Wind-Resistant Outer Layer
The 100% Polyester shell combines wind resistance and breathability to help regulate sweat and prevent overheating during strenuous or extended activity.

Waist and Leg Elastic
Durable polyester-rubber blend

Made in the U.S.
Materials are also made and milled in the U.S. or domestically sourced in the U.S.

Sustainability

Materials and Manufacturing in the U.S.

Polartec® Fleece:
100% made in the U.S. and made from recycled polyester.

Other Materials:
Made in the U.S. or domestically sourced in the U.S.

Manufacturing:
We manufacture 100% in the U.S. to support independent regional partners and to minimize transportation of both materials and finished product.

Minimal Labels:
One single product label per product, made from recycled paper.

Sustainable Packaging:
Recyclable, lightweight mailer made from uncoated (natural brown) kraft paper. Padding is also made with macerated (shredded) paper—no plastics. This means the entire package is fully recyclable in a standard, curbside paper recycle bin with other paper products.

Paperless Receipt and Packing Slip:
Your order details and receipt are in your confirmation email. Plus, we're available by email and chat for anything you need.

Zero Cutting-Waste Initiative:
Our minimal product design creates minimal cutting waste of fabric. Any cutting scraps are never discarded. They are saved and repurposed to eliminate becoming landfill waste.

When Will I Receive My Order

We work quickly to ship your order within 24 hours. Once your order has shipped, you will receive an email with further information. Delivery times vary depending on your location.