Men's Clothing > Fleece & Base Layers > Lightweight

Designed for wet-then-chill pursuits like backcountry skiing, alpine climbing and mountain trekking, our fastest-drying performance baselayer will keep you cool during endurance activities in warmer temperatures, but also insulates when skies turn dark. Its open knit invites airflow and provides excellent wicking and exceptional breathability. A draft flap backs the...

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...

Wear them beneath shell pants on your trudge up Whitney, or on their own in your bag back at camp. Made from an open-knit 4-oz polyester (54% recycled) that provides exceptional breathability, wicks perspiration and dries in a flash, our Capilene 2 Bottoms are the ultimate in comfort beneath outer...

Get two of your favorite things in one lightweight baselayer: Patagonia's Capilene I Graphic Crew provides you with quirky graphics and silky soft Capilene 1. Make a statement with the clever front graphic while you enjoy the wicking power and quick drying provided by Capilene I, a light fabric constructed...

Fine Merino wool makes the Arc'teryx Rho LTW Bottom soft against your skin and has a natural ability to move moisture away from your body. The Rho LTW Bottom retains its warmth even when wet should you happen to step in a river while trekking back to camp. Lycra adds...

For those of us who run HOT! The Burton Lightweight Crew is the perfect performance baselayer for any sport, any time. Multi-purpose, one of the best Burton buys. For those of us who run HOT! These are perfect for any sport any time. Smell fresh, Stay warm, Dry, and chafe...

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...

Silky-soft Capilene® 1 is the lightest of all our technical baselayers. A master at managing moisture to keep you cool during active use in warm to sweltering conditions, it also helps protect from the sun and acts as an excellent quick-wicking baselayer beneath heftier Capilene® or wool insulation when the...

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...

Zip up the Ibex Men's Woolies Zip T-Neck to tackle the steep and deep and then keep it on for that après ski party with friends. When you skin up on your next ski tour, the New Zealand merino wool pulls moisture from your skin and distributes it to the...

Designed to fit close to the body, this raglan long sleeve top has a higher neck to trap in the heat when you need it most. Flatlock stitching and a seamless underarm reduce friction from internal seams, which will make this top one of the most comfortable pieces of clothing...

Whether you're heading out for a brisk morning run or gunning for some spring corn, the Marmot Men's Lightweight Bottom wicks moisture and cools you down when you work up a sweat. Wear these anti-microbial pants under ski pants during a tour or underneath your shorts on a chilly run....

Wear the Mountain Hardwear Lightweight Power Stretch Boot Length Tight for routes in cool weather or as a midlayer when the mercury drops. Lightweight, breathable and providing exceptional moisture management, the Mountain Hardwear Lightweight Power Stretch Boot Length Tight is the ideal winter baselayer for skiing, mountaineering or alpine climbing....

The Spyder Men's WInterskyn Pants are designed in Polypropylene, nylon, and stretch Spandex to provide wicking, support, and comfort in a next-to-skin pant. Fabric Body: 48% Polypropylene, 48% Nylon, 4% Spandex Seamless Knit Garment

Comfortable trips in the backcountry all start with a stellar baselayer. The XTC Lightweight Crew keeps your core dry and comfortable hour after cold hour. Made with Carbon from Bamboo technology, moisture and sweat wick away from your skin, moving to the outer layer of the shirt where it quickly...

Pull on the 686 Direct Top Layer as your defense against clammy, cold skin while you ride. The Direct Top’s polypropylene fabric is hydrophobic, so it stays totally dry while your midlayer does the wicking. Your skin stays dry, you stay warm, your perma-grin stays perma.

The Burton Lightweight Baselayer Crew for Men works great all season—add it as a base layer midwinter for a touch of added warmth or rock it under your hoodie in the spring. Unlike cotton, DRYRIDE Ultrawick™ fabric wicks away wetness to keep you dry all day. Quite worrying about an...

The Advance Lightweight Long Sleeve Crew by Mountain Hardwear is a lightweight ctew that performs like a heavyweight champ. The channeled construction increases performance while decreasing the weight. This quick drying synthetic fabric breathes and has a Chitosan anti-microbial finish that controls odors. Wicking, fast drying, anti-microbial fabric 100% polyester...

Get a full sleeve without the needle. Dry Ride Micro Poly with Spandex Dry Wick Technology - Quick Drying and Highly Breathable Stretch 360 for Unlimited Mobility Chafe Free Softlock Seams for Comfort Artwork Inspired by Romain's Tattoo Discontinued Colors

Long pants in all-year quality on the basis of body mapping and three different fabrics for an optimal body temperature during all activity levels. Perfect in combination with boxers or briefs. Specifications Fabric: Polyester Microfiber / Merino Wool Contoured cut Antimicrobial feature to avoid unpleasant odorQ00% polyester microfiber for efficient...

This lightweight underwear top can be worn alone or used as a performance insulation layer. Quick-drying polyester fabric wicks moisture away from your skin Loose fit features two-way comfort stretch Flatseam construction is soft and non-chafing next to skin Dropped back hem stays tucked in Fabric provides UPF 50+ sun...

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...

The XTC Lightweight Pants are baselayer bottoms by The North Face that provide exceptional wicking, effectively absorb odor and block ultraviolet radiation by utilizing cutting edge Bamboo Charcoal Technology. Lightweight fabric makes them an ideal base in cold conditions. Bamboo Charcoal Technology embeds Bamboo charcoal in raw polyester, creating a...

Slide a pair of boots on without uncomfortable bunching of your socks or pant leg with the higher, boot-length cut. As cold mists roll down the mountainside, be sure to prepare for your ascent with a warm pair of Mountain Hardwear's Advance Lightweight Boot Top Tights as your baselayer. Wear...

Designed to complement your all-season, all-weather attire, the Rho SL Crew Neck from ARCTERYX is the ultimate baselayer for your adventures in nature's playground. Layer it up on cold days or wear it alone for your outdoor aerobic pursuits; this athletically cut, polyester foundation excels at moisture wicking and odor...