Patagonia Capilene Thermal Weight Boot-Length Baselayer Bottom - Men's Smolder Blue, XXL

The Cap Thermal Weight Boot Length Bottoms use Polartec Power Grid fabric, a stretch-knit blend of recycled polyester and spandex, so warmth holds without limiting a stride.

HeiQ Mint, a plant-based odor treatment, keeps them fresh through repeat wear, and the boot-length cut sits clean above the ankle instead of bunching under a boot cuff.

The fitted cut layers cleanly under a boot or shell, and they're sewn in a Fair Trade Certified factory.

What Our Gearhead(R) Experts Are Saying:"The boot-length cut sits flush above my boot cuff instead of bunching up mid-shin like a full-length pair does.

The stretch keeps pace with every step in, and three days into a trip these still don't need a wash.".