Patagonia Capilene 1 Crew - Long-Sleeve - Men's

The Patagonia Men's Capilene 1 Long-Sleeve Crew is an ultralight, fast-wicking top for warm-weather trail runs or hikes.

Backcountry.com Merino Zip Tee - Long-Sleeve - Men's

We made our Backcountry.com Men's Merino Long-Sleeve Zip Tee with super-fine New Zealand Merino, flat-locked seams, and a ½ zip chest so you can tackle anything from a 5-day backpacking trip to a run around the neighborhood.

Icebreaker BodyFit260 Crew - Long-Sleeve - Men's

The Icebreaker Men's 2-Tone Long-Sleeve BodyFit260 Crew offers some much-needed style in base layer fashion, not to mention it's made of 100% Merino, the best natural fiber for temperature regulation in the world.

Patagonia Capilene 3 Crew - Long-Sleeve - Men's

The Patagonia Men's Capilene 3 Long-Sleeve Crew features a dense honeycomb polyester fabric that feels soft on your skin, insulates you, and provides low-friction comfort with other layers.

Patagonia Active Classic Boxer - Men's

Stuff your carry-on with a couple pairs of Patagonia Men's Active Classic Boxers, and you're ready for a trip anywhere.

Arc'teryx Rho SL Crew - Men's

Arc'Teryx made the Rho SL Long-Sleeve Crewneck Shirt to be a versatile and lightweight shirt that works by itself in warm weather or as a baselayer in colder conditions.

Patagonia Active Sport Boxer Brief - Men's

The Patagonia Men's Active Sport Boxer Briefs should be the first step of your layering system when you go skiing, hiking, or climbing.

Backcountry.com Merino Bliss Lightweight Long Underwear Top - Men's

With its soft, naturally odor-resistant 18-micron Merino wool knit and ½ neck zip, our Backcountry.com Men's Merino Bliss Lightweight Top covers you in functional comfort, minus the synthetic funk factor.

Icebreaker BodyFit150 Boxer w/Fly Brief - Men's

Wool boxer briefs? That's right. The Icebreaker Men's BodyFit150 Boxer Brief gives you all the benefits of merino wool minus the itch.

Patagonia Active Boxer Brief - Men's

Patagonia reduces relative humidity in your shorts with the Men's Active Boxer Brief. These boxer briefs feature wicking Capilene fabric.

Icebreaker BodyFit260 Tech Top - Long-Sleeve - Men's

The Icebreaker Men's BodyFit260 Tech Top features super high quality New Zealand merino wool.

Arc'teryx Accelero Pullover Top - Men's

The Arc'teryx Men's Accelero Pullover ½-Zip Lightweight Top's stretch polyester material moves with you as you ski, climb, hike, or run.

Under Armour Base 2.0 Crew Top - Long-Sleeve - Men's

The Under Armour Men's Base 2.0 Midweight Long Underwear Top keeps you warm by quickly wicking moisture away from your body and gives you a tailored fit that's not too tight.

Forum Body Bag One-Piece Baselayer - Men's

The Forum Men's Body Bag One-Piece Baselayer brings out your inner super hero while keeping you nice and warm.

686 Direct Base Layer Top - Men's

Pull on the 686 Direct Top Layer as your defense against clammy, cold skin while you ride.

Forum T-Neck Top - Men's

Ibex D-Lux Boxer - Men's

Put on the Ibex Men's D-Lux Boxer and find out what you've been missing. Lightweight New Zealand merino wool sinks you into a sea of softness, and Ibex's relaxed fit gives you plenty of room to move around.

The North Face Stretch Softwool Top - Long-Sleeve - Men's

When you’re hunkered down in your tent for a week at a time, The North Face Men’s Stretch Softwool Top’s odor-fighting merino wool keeps gnarly odors at bay.

The North Face Stretch Softwool 1/4-Zip Top - Men's

You can’t very well bring a suitcase on a month-long expedition, so The North Face Men’s Stretch Softwool ¼-Zip Top not only wicks moisture and dries in a flash, but it helps fight gnarly odors during extended use.

Icebreaker Beast Boxer Brief w/Fly - Men's

Now you can soothe the savage beast with Icebreaker’s Beast Boxer Brief with fly.

DAKINE 3/4 Long Underwear Bottom - Men's

Base layer pants that are too long will bunch up in your boots and cut off circulation to your feet. The DAKINE ¾ Pant picks up where your snowboarding socks leave off.

Burton AK Select Top - Men's

You have definitely never seen a base layer that looks like the Burton Men’s AK Select Top.

Burton Shant Pant - Men's

Marmot Midweight Zip Neck Top - Long-Sleeve - Men's

The Marmot Men's Midweight Zip long sleeve shirt covers you in a shaped fit that's easy to layer without accumulating bulk, and the half neck zip dumps heat when the temps rise.

Outdoor Research Sequence Zip T Pullover - Men's

Outdoor Research combines the technical performance of wool and polyester with the Men's Sequence Zip Tee.

Marmot Lightweight Zip-Neck Shirt - Long-Sleeve - Men's

Layer with the moisture-wicking Marmot Men's Lightweight Long-Sleeve Zip Neck shirt on chilly days and bust open the neck zipper when you need to dump some serious heat.

Helly Hansen Odin Top - Men's

Miami muscle shirt or super-tech long-sleeve top? The innovative construction of the Helly Hansen Men's Odin Baselayer High Neck assures the latter.

SmartWool Microweight Boxer Brief - Men's

Wool in the springtime? Yup, the Smartwool Men's Microweight Boxer is 100% merino wool. It might also be the most versatile pair of skivvies you'll ever have the privilege of pulling over your cheeks.

Backcountry.com Merino Crew Shirt - Long-Sleeve - Men's

Uncompromising in both quality and form, our Backcountry.com Men's Merino Long-Sleeve Crew Shirt offers the superior moisture managing, naturally anti-odor, and comfort of super-fine New Zealand Merino at a price that might make you pee a little.

The North Face XTC Lightweight Crew - Men's

Tired of your base layers restricting your movement? The North Face Men's XTC Lightweight Crew has underarm gussets for a full range of motion. This long-sleeve shirt dries quickly and resists odor.

The North Face TKA 100 Glacier 1/4 Zip Fleece Pullover - Men's

The North Face TKA 100 Glacier ¼ zip is a soft microfleece pullover perfect for layering or just bumming around on a crisp spring day.

Stoic Merino Bliss Shirt - Long-Sleeve - Men's

With its soft, naturally odor-resistant 17.5-micron Merino wool knit and ½ neck zip, the Stoic Merino Bliss Shirt covers you in functional comfort, minus the synthetic funk factor.

Under Armour Boxer Short - Men's

The Under Armour Men's Boxer Short keeps you cool and comfortable at work and during your workout.

Stoic Merino Crew Shirt - Long-Sleeve - Men's

Forget your fears about itchy wool—the Stoic Merino Crew Shirt is a whole different beast. Employing 17.5-micron Merino wool from New Zealand, the Merino Crew Shirt ensures comfortable, dry days whether you're out for a mid-January dawn patrol or an autumn ride down the single track.

Under Armour Boxer Jock - Men's

Stay cool and secure right down to your skivvies when you wear the Under Armour Men's Boxer Jock. These boxer briefs give you a snug compression fit for support that won't hinder athletic range of motion.

Ex Officio Give-N-Go Boxer Brief - Men's

The Ex Officio Men's Give-N-Go Boxer Brief aren't your typical pair of undies. These breathable boxers air dry in a few hours, wick sweat, and fight odor.

Icebreaker BodyFit200 Oasis Crew - Men's

The Icebreakers Men's BodyFit200 Oasis Crew is a great all-around lightweight base layer made from the ultimate breathable insulation—Merino wool.

Ex Officio Give-N-Go Brief - Men's

Did you forget to pack underwear? Nope, you’re wearing the Ex Officio Men’s Give-N-Go Brief and you only need one pair.

Ex Officio Give-N-Go Boxer - Men's

The Ex Officio Men's Give-N-Go Boxer will make all those cotton jobbies in your top drawer obsolete. Whether you're on vacation or out for a hike, this travel boxer wicks sweat, stretches, and fights odor for a new level of comfort and performance.

Under Armour Short Boxer Jock - Men's

Imagine how good a breathable mesh crotch panel in your boxers would feel when you're sweating bullets on runs, hikes, and workouts.