Featuring a classic neckline design with flatlock comfort seams, the SmartWool Men's Midweight Crew is the perfect next-to-skin layer for forays into alpine environments.

Smartwool Footless Tight Sock (Spring 2008) - Women's The Women's Footless Tight Sock by Smartwool.Features: 68% wool, 30% nylon, 2% spandex Height: footless tight ...

Wool in the springtime? Yup the Smartwool Mens Microweight Boxer is 100% merino wool.

Wear the SmartWool Mens Lightweight Bottom for cool-weather aerobic activities or as a next-to-skin base layer.

Perfect for stop-and-go activities in the cold as a stand alone or base layer. Covered elastic waistband. Flatlock seam construction eliminates chaffing.

Airy yet warm, cozy yet durable, these are the highlights of the Samrtwool Microweight Tee for Men that's just slightly lighter than the Lightweight Tee.

Airy yet warm, cozy yet durable, these are the highlights of the Samrtwool Microweight Tee for Men that's just slightly lighter than the Lightweight Tee.

The Smartwool Lightweight Crew is a great primary or base layer for aerobic activity. The high-quality merino wool fibers wick and evaporate to help you stay dry and...

Smartwool's Midweight Zip T is part of their heaviest line, and it is perfect for forays into alpine environments where temperatures -- and schedules -- fluctuate.

Wear the Lightweight Bottoms from SmartWool when you need a soft, breathable base layer for aerobic-level output in all weather.

Even sheep will be jealous when you wear SmartWool's Microweight Bottoms. Merino wool in a unique jersey knit insulates, pulls moisture away from your body, and...

Wear the SmartWool Mens Microweight Long-Sleeve Crew Shirt for cool- or warm-weather aerobic activities or as a next-to-skin base layer.

Even sheep will be jealous when you wear SmartWool's Microweight Bottoms. Merino wool in a unique jersey knit insulates, pulls moisture away from your body, and...

You've been busting tail in the gym and now it's time to show off that hard-earned physique on the trails.

You've been busting tail in the gym and now it's time to show off that hard-earned physique on the trails.