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Men's Base Layer Tops

$ 16.93 $ 37.00 14% OFF
The Hot Chillys Men's Pepper Skins Crewneck Top is your standard, dependable thermal underwear.
$ 115.00 – $ 125.00 UP TO 8% OFF
The Smartwool Men's Classic Thermal Merino Base Layer Crew Shirt offers natural warmth, moisture control, and comfort with 100% Merino wool and a slim performance fit.
$ 22.93 – $ 30.93 UP TO 14% OFF
Gear up for adventure with The Blackstrap Men's Summit Base Layer Crewneck! Stay warm and comfortable all day long. Shop now!
$ 18.93 $ 43.00 13% OFF
The Hot Chillys Men's Pepper Bi-Ply Long Sleeve Crewneck is
$ 90.00 $ 100.00 10% OFF
The Smartwool Men's Classic All-Season Merino Base Layer Long Sleeve Shirt offers durable comfort with Merino wool softness and year-round versatility.
$ 55.00
The Under Armour Men's ColdGear® Armour Fitted Mock Shirt keeps you warm and dry without being bulky or riding up.
$ 79.94 $ 88.82 10% OFF
The Mountain Hardwear Men's Up First Tech Fleece delivers lightweight warmth, odor resistance, and versatile layering performance for active use
$ 77.00
The Hot Chillys Men's Micro-Elite Chamois Crewneck Fits like
$ 46.93 $ 59.99 21% OFF
The Extreme Base Layer Top features microfleece warmth, four-way stretch, and moisture-wicking performance for cold-weather comfort and mobility. Shop now!
$ 30.93 $ 35.86 13% OFF
Embrace the outdoors with the Blackstrap Men's Therma Base Layer Hoodie. Stay warm and comfortable - shop now!
$ 23.93 – $ 59.99 UP TO 14% OFF
The Blackstrap Men's Skyliner Crewneck Top delivers a breathable, moisture-wicking, and odor-resistant fit with four-way stretch and thermal regulation for all-season performance.
$ 89.00
The Patagonia Men's Capilene® Midweight Zip-Neck Baselayer Top is warm, breathable, quick-drying and made with HeiQ® Fresh durable odor control for daily use.
$ 39.99
The Thermotech Men's Performance Base Layer Top offers the midweight warmth, comfort and moisture management that you need in a base layer.
$ 130.00 – $ 150.00
The Smartwool Men's Intraknit™ Thermal Merino Base Layer Crew Shirt combines Merino comfort with 3D mapping and mesh ventilation for warmth and performance.
$ 180.00
Experience comfort and style with the Dale of Norway Men's Vail Half Zip Baselayer. Perfect for every adventure - shop now!
$ 54.99
The Thermotech Men's Extreme Base Layer Top offers the heavyweight warmth, comfort and stretching you need to enjoy winter.
$ 58.93 $ 74.99 21% OFF
The Performance Merino Base Layer Top offers breathable warmth, odor control, and flexible comfort for winter adventures and layering ease. Shop now!
$ 39.99
The Thermotech Men's Performance Base Layer Top offers the midweight warmth, comfort and moisture management that you need in a base layer.
$ 69.99
Stay warm and comfortable outdoors with the Thermotech Men's Merino Wool Crewneck Top. Shop now for ultimate performance!
$ 23.93 $ 27.86 14% OFF
Stay warm and comfortable on your adventures with the Blackstrap Men's Vista Base Layer Hoodie. Shop now!
$ 75.00 $ 85.00 11% OFF
The Clima-Tek Crewneck Baselayer Top offers soft, stretchy, moisture-wicking comfort with UPF 30 protection and odor control for all-day performance. Shop now!
$ 180.00
The Aksla Half Zip Baselayer delivers soft merino wool comfort, moisture control, and all-season versatility with a performance fit. Shop now!
$ 49.95 $ 55.00 9% OFF
The Hot Chillys Men's Peach Skins Roll T-Neck combines the soft, light feel and strength of microfiber polyester with an interlock construction to give you warmth without weight and freedom of movement.
$ 54.99
The Thermotech Men's Extreme Base Layer Top offers the heavyweight warmth, comfort and stretching you need to enjoy winter.
$ 85.00 $ 89.50 5% OFF
Hot Chillys new Clima-Tek fabric features a buttery soft, cottony hand, with all of the performance of a polyester/spandex.
$ 27.93 – $ 30.93 UP TO 13% OFF
Gear up for the slopes with the Blackstrap Men's Summit Base Layer Hoodie, your perfect partner for warmth and comfort. Shop now!
$ 23.93 $ 27.86 14% OFF
Stay warm and active in sub-zero temps with the Blackstrap Men's Vista Base Layer Crewneck. Shop now for ultimate comfort and performance!
$ 35.87 $ 99.00 10% OFF
The Premier Zip T-Neck Pullover delivers 360 stretch comfort, moisture control, and athletic style for all-day performance. Shop now!
$ 34.93 $ 44.99 22% OFF
The Performance Base Layer Top features warm microfleece, moisture-wicking tech, and odor control for peak cold-weather comfort and versatility. Shop now!
$ 130.00 – $ 150.00 UP TO 13% OFF
Made with innovative Intraknit™ technology, this men's base
$ 79.00
The Patagonia Men's Capilene® Midweight Crew Baselayer Top is a classic, go-anywhere all-around baselayer, made with completely recycled content.
$ 69.93 $ 93.83 11% OFF
The Smartwool Men's Intraknit™ Merino 200 1/4 Zip T-Neck is comfortable and wonderfully patterned.
$ 39.47 $ 109.00 10% OFF
The Vital 1/2 Zip Pullover combines stretch comfort, breathability, and sleek mountain-inspired style for peak performance and versatility. Shop now!
$ 64.95 – $ 64.99 7% OFF
The Hot Chillys Men's Micro Elite Top is comfy and warm.
$ 74.95
The Hot Chillys Men's La Montaa Fleece Zip T-Neck is truly the king of the mountain for warmth.
$ 60.00
The Essential Lightwarm Crewneck Pullover delivers soft fleece warmth, stretchy comfort, and casual versatility for everyday and active wear. Shop now!
$ 159.99
The ActionHeat Men's 5V Battery Heated Base Layer Shirt delivers flexible, battery-powered warmth with breathable comfort and lasting performance in cold conditions.
$ 129.99
The Seirus Men's Heatwave™ Mapped Long Sleeve Crew Top keeps the warmth, ventilation, and perspiration during your activities.
$ 99.99
The Seirus Men's Heatwave™ Reversible Long Sleeve Crew Top provides all the comfort and warmth you need in this durable reversible top.
$ 44.95
The Hot Chillys Men's Peach Skins Crewneck Top provides a good degree of warmth, especially when paired with a solid second layer.

Men's The Science Behind Base Layers

Men's Base Layer Tops

The first step in gearing up for cold-weather adventures. As the foundation of your winter outfit, the right base layer is paramount to comfort and performance. Shop leading brands including Hot Chillys, Smartwool, Under Armour, Patagonia, and Seirus.

The Science Behind Base Layers

Your base layer is the first line of defense against the cold. Sitting directly against your skin, it regulates body temperature and wicks away moisture. Whether you're flying down a slope or trekking up a snowy trail, a high-quality base layer maintains a comfortable body climate no matter how intense the activity.

Choosing the Right Fabric

A good base layer should be snug-fitting but not restrictive, lightweight and breathable yet reliably insulating. Synthetics like polyester excel at wicking moisture away from the skin, while natural fibers like merino wool offer excellent warmth, odor resistance, and temperature regulation.