Free U.S. Shipping $98+

5 REASONS RUNNERS ARE DITCHING THEIR OLD UNDERWEAR FOR THE LYNX PD

It's the least seen, but most important part of your running kit. Our Polartec®-powered Lynx PD base liner wicks moisture and dries quickly with gentle compression, keeping your comfortable and chafe-free.

1. EVERY DETAIl is designed FOR PERFORMANCE 

From the fit to the fabric and finishing touches, the Lynx PD was designed by real runners, with the realities of long hours on the trail in mind. 

2. proven at the toughest races on earth

The go-to liner of TEAM MNTN TSTD Athlete Aaron Kubala, who won the 2026 Mammoth 200 and wore the Lynx PD through the Speed Project Chile in 2025.

3. they stay comfortable even when sweaty

Polartec Power Dry pulls moisture from the skin and transfers it to the outer layer, where it quickly dries to keep you comfortable in both hot and cool conditions.

4. the fabric is made by world-class material scientists

The inventors of modern synthetic fleece, Polartec produces some of the most advanced textiles on Earth and is trusted by top outdoor performance brands.

5. the seams aren't really seams at all 

Traditional underwear seams are prone to chafing in the last place you want it. The Lynx PD utilizes Acrofuse™ bonding technology to create smooth seams and maintain the natural stretch of the Polartec fabric.

WHAT REAL RUNNERS ARE SAYING

“Fantastic liners"

My first run in them was on a tough 20+ mile trail in hot weather. No issues with chafing, and I found them extremely comfortable. Breathable, not restrictive, stayed where I needed them to.

Andrew K.

Verified Buyer

“Differentiate from the rest"

The feeling of the fabric, the fit and the runs are just perfect. I recommend this product without hesitation

Oliver R.

Verified Buyer

“Perfect liners."

I don't even think about them when I wear them, which is the greatest review I could give. These are truly seamless, they fit like a glove, are extremely breathable, and the pouch in the front works better than anything else I've tried.

Blake M.

Verified Buyer

1. EVERY DETAIl is designed FOR PERFORMANCE 

From the fit to the fabric and finishing touches, the Lynx PD was designed by real runners, with the realities of long hours on the trail in mind.