Temperature Control
Adapts to changing temperatures for all-day comfort
Engineered Durability
Built for repeated use — reinforced where it counts.
Freshness Support
Helps keep feet fresher longer through repeated wear.
Dry Comfort
Moves moisture away for dry comfort through long wear.
Lifetime Warranty
If they wear out, we replace them. No expiration.
Five heights. One standard of performance.
Different footwear. Different coverage. The same premium natural-performance advantage.
Built for the footwear you actually wear.
Micro | Ankle
6" Crew
9" Crew
14" OTC
Height comparison guide
Find the right height for your footwear and the conditions you face.
| Height | Coverage | Best with | Available weights |
|---|---|---|---|
| Micro | Lowest | Athletic, casual | Lightweight + Midweight |
| Ankle | Above ankle | Athletic, sneakers | Lightweight |
| 6" Crew | Mid-calf | Hiking shoes, low boots | Lightweight + Midweight |
| 9" Crew | Higher crew | Hiking + work boots | Lightweight, Midweight + Heavyweight |
| 14" OTC | Over the calf | Tall boots | Lightweight, Midweight + Heavyweight |
Free Shipping
On orders $100+
Loyalty Rewards
Earn. Redeem. Repeat.
Lifetime Warranty
Buy them once. Wear them hard. Every pair is backed for life.
American Made
Built here. Worn everywhere. Supporting American jobs and domestic manufacturing with every pair.