Men's Clothing > Fleece & Base Layers

The M's Microweight Boxer Brief features a traditional fly design, covered elastic waistband and flatlock seam construction that eliminates chafing. With our Microweight fabric, you stay dry and fresh during strenuous activity as the fabric quickly transfers perspiration away from your skin. SmartWool® jersey-knit, fine merino wool helps maintain a...

The versatile Microweight T-Shirt features SmartWool's soft merino wool fabric, which pulls sweat vapors away from your skin to keep you dry and comfortable. Wear this SmartWool short-sleeve shirt by itself on a warm-weather trail run or as a base layer underneath a fleece and a ski jacket. Merino wool...

Perfect for forays into alpine environments, the SmartWool Men's Microweight Bottoms surround your legs in comfort and performance with next-to-skin custom fitting, a covered elastic waistband, and flatlock seams. SmartWool 100% jersey knit Merino wool that has tiny air pockets providing an insulating layer of natural air, is the perfect...

The SmartWool Midweight Zip top offers natural stretch and breathability for stop-and-go activities in fluctuating temperatures. Jersey-knit merino wool maintains your comfort whether the climate is warm, cold or in between 10 in. zipper ventilates on demand, and raised collar helps keep your neck warm Shoulder panels eliminate top shoulder...

SmartWool's heaviest Next-To-Skin option, the Midweight Crew is perfect for adventures in alpine environments where the only thing you can count on is the weather changing. Made from 100% merino wool jersey knit Absorbs, transfers, and evaporates moisture for dry comfort Regulates body temperature with breathable, midweight warmth for cold-weather...

The Mens Smartwool Lightweight Crew regulates your temperature all year long as a baselayer or on its own. Made of 100% Wool Jersey Knit, the Lightweight Crew has all the benefits of soft New Zealand wool. A natural fit for warm-weather, this SmartWool wonder is odor-free, wicking, and breathable. To...

Wear the SmartWool Men's Lightweight Crew Top for cool-weather aerobic activities or as a next-to-skin base layer. SmartWool's porous natural fibers move moisture while it is still in vapor form before it has a chance to condense on your skin; you stay drier and more comfortable throughout your entire workout....

Built with SmartWool's Next-To-Skin fabric, the SmartWool NTS Lightweight Zip T for Men is the ideal way to start your layering system when you need four-season versatility and love cool weather activities. Worn alone or layered up, the NTS Microweight Zip T is moisture wicking, temperature regulating and odor resistant,...

Surrounding your legs in comfort and performance, the SmartWool Men's Microweight Bottoms feature next-to-skin custom fitting, a covered elastic waistband, and flatlock seams. SmartWool 100% jersey knit Merino wool that has tiny air pockets providing an insulating layer of natural air, is the perfect body temperature regulator, and keeps you...

SmartWool's moisture-moving fibers make these Lightweight Pants a breathable, odor-free option for warm weather workouts or highly aerobic winter activities. Made from 100% SmartWool jersey knit for amazing softness and a light, airy feel Exposed elastic waistband for a custom fit Traditional fly design Flatlock seams for nonchafing comfort SmartWool...

The SmartWool Men's Midweight Boot Top Bottom forges peace between your base layer, socks, and boots. End the bunch-up junk show and opt for these merino not-so-long johns. These odor-fighting, non-chafing, softer-than-your-baby-blanket bottoms come in handy for anything from skiing to cold-weather climbing. SmartWool's merino wool wicks better than polypro...

Ready to carry you through the day from sunrise, through your bike commute, the workday, and your workout, the soft Lightweight Boxer from SmartWool are idea for everyday and active use. Sweat and stink are never a problem, the soft wool fabric naturally wicks moisture from your skin, dries quickly,...

A crew neckline and jersey knit fit make Smartwool's Microweight Tee a perfect base or stand-alone layer for everything from biking to hiking. Microweight is perfect as a next-to-skin apparel for high performance activities in the warmest weather. Because Smartwool fibers wick moisture away while it's still in a vapor...

SmartWool's heaviest next-to-skin option, the Midweight Zip T offers excellent moisture management, zip-T ventilation, and next-to-skin softness. Made from 100% SmartWool jersey knit for itch-free softness Zip-T (10-in. zipper) with chin guard to prevent chafing Shoulder panels eliminate top shoulder seams for layering comfort Flatlock seams for nonchafing comfort SmartWool...

A traditional boxer fit with all the comfort and moisture wicking qualities of SmartWool jersey knit, the SmartWool Lightweight Boxer for Men provides year-round comfort with a relaxed fit and a functional fly. 100% SmartWool jersey knit Traditional fly design Exposed logo elastic waistband Flatlock seam construction eliminates chafing Relaxed...

The Smartwool Men’s Lightweight ¼-Zip Top is like the caped crusader of the baselayer world—at any time, and in any conditions, it’s ready to wick moisture, dry in a flash, and naturally fight odors thanks to its soft, stretchy merino wool construction. Flatlock seams give it next-to-skin comfort and the...

Crew neckline with raglan short sleeves Rib fabric creates a form fitting silhouette Contrast color flatlock seams add interest Flatlock seam construction eliminates chafingQ00% Smartwool rib knit

The SmartWool®'s Zip-T is a midweight long underwear top that's luxuriously comfortable against the skin while offering proven moisture, temperature, and odor-control abilities. Best for stop-and-go winter activities like skiing, boarding, and climbing. Soft 100% SmartWool jersey knit; no itch Midweight base layer can be worn alone or as an...

If you’re searching for a baselayer that promotes heat retention during physical activity, draws moisture away from your skin for quick evaporation, and provides natural odor reduction, you can count on the Smartwool Men’s Lightweight Crew Top. A crucial aspect of the lightweight fabric is its versatility in varying weather,...

SmartWool's Lightweight Zip T is a smart choice for warm-weather wear or cool-weather layering with itchless wool fabric that wicks quicker, washes easier, and smells better in the long haul than synthetics. Wear it as a baselayer for warmth in cold conditions or as a standalone - the 10-inch zip...

Feel the smooth power of silkweight all day when you wear the SmartWool Microweight 1/4-Zip Top. As soon as it glides over your skin in the morning, you’ll know that cotton is history. SmartWool holds the heat in close to keep you warm, but lets the sweat escape so you...

The Microweight's lightness makes it perfect for any warm-weather aerobic activity, either alone or as an undergarment. Couple this lightness with the most efficient moisture management material on the market and you get a layer that keeps you dry. 100% wool jersey knit

The body-fitting, long-sleeve NTS Microweight Crew for men is great for warm or cool weather activities. Wear it alone or as a base layer. Jersey-knit, fine merino wool helps maintain a comfortable temperature whether the day is hot, cold or in between SmartWool items are guaranteed not to itch and...

The Microweight Next-to-Skin Bottoms by Smartwool are made with a soft wool jersey knit fabric that is lightweight and offers awesome warmth in the cold days of winter. No itch wool and is highly breathable for any activity you choose to do outside. Covered elastic waistband Traditional fly Flatlock seam...

When you head out for an epic powder day, three-pitch ice climb, or a backcountry snowshoe tour, the Smartwool Men’s Midweight ¼-Zip Top is the perfect way to start your layering. Made from soft, stretchy, odor-resistant merino wool, this zip shirt wicks moisture and dries just as quickly as your...