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Mens Baselayers

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174 products
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The Smartwool Men’s Classic Thermal Merino Colorblock Crew Base Layer Top features black sleeves and lower body, an olive green midsection, a light beige chest, subtle stitched details, and a small logo on the left upper sleeve.
Sale
A person with braided hair models The North Face Mens FD Pro 160 Crew in black with long sleeves and FlashDry-Pro technology, paired with black-and-green pants with white accents, standing against a plain white background.
A person with braided hair wears a black The North Face Mens FD Pro 160 Crew and black-and-green pants, ideal for hiking, standing against a plain white background.
Sale
A person stands against a white background with hands in pockets, wearing the Moosejaw Unisex Bed to Bar Onesie in red and black plaid organic cotton and tan slippers.
Moosejaw Unisex Bed to Bar Onesie Moosejaw
Sale
A man with long brown hair stands turned slightly right, wearing the Icebreaker Mens 200 Oasis LS Crewe Top in maroon and black pants against a plain white background.
Icebreaker Mens 200 Oasis LS Crewe Top Icebreaker
Sale
A man stands barefoot in fitted black The North Face Mens FD Pro 160 Tight leggings, made from recycled polyester with a small white logo on the left hip. His upper body is out of frame against a plain light background.
A person stands barefoot in The North Face Mens FD Pro 160 Tight, made from recycled polyester with FlashDry-Pro technology and a small white logo on the left thigh, set against a plain, light background.
Sale
A man stands facing forward, wearing The North Face Mens Big Pine Midweight Hoodie made from recycled material with a chest logo and cream pants, set against a plain white background.
Mens Big Pine Midweight Hoodie The North Face
Sale
Ortovox Mens 185 RockNWool Long Pant Ortovox
Ortovox Mens 185 RockNWool Long Pant Ortovox
Sale
Helly Hansen Mens Lifa Active Crew Helly Hansen
Helly Hansen Mens Lifa Active Crew Helly Hansen
Sale
A man with short brown hair models the Icebreaker Mens Merino 200 Sonebula LS Crewe, a fitted long-sleeve navy base layer shirt with white sleeve stripes and matching pants, standing against a plain white background.
Sale
Smartwool Mens Intraknit Thermal Merino Colorblock Crew Base Layer Top Smartwool
Smartwool Mens Intraknit Thermal Merino Colorblock Crew Base Layer Top Smartwool
Sale
Helly Hansen Mens Lifa Merino Midweight Pant Helly Hansen
Helly Hansen Mens Lifa Merino Midweight Pant Helly Hansen
Sale
Smartwool Mens Intraknit Merino 250 Thermal 1/4 Zip Smartwool
Smartwool Mens Intraknit Merino 250 Thermal 1/4 Zip Smartwool
Sale
Icebreaker Mens Anatomica Tank Icebreaker
Icebreaker Mens Anatomica Tank Icebreaker
Sale
Rab Mens Syncrino Base Tee Rab
Rab Mens Syncrino Base Tee Rab
Sale
A man with curly, shoulder-length hair wears a green Smartwool Men's Classic Thermal Merino Base Layer Hoodie featuring a camouflage tree pattern on the torso, standing slightly sideways with his hands together.
Sale
Norrona Mens Pureull Longs Norrona
Norrona Mens Pureull Longs Norrona
Sale
Ortovox Mens 185 RockNWool SS Top Ortovox
Ortovox Mens 185 RockNWool SS Top Ortovox
Sale
Black long-sleeve athletic shirt with Rab logo on left chest, shown flat on a white background. The Rab Mens Force LS Tee is a moisture-wicking baselayer, perfect for active pursuits.
Rab Mens Force LS Tee Rab
Sale
SAXX Mens Quest Quick Dry Mesh Bottom Fly SAXX
SAXX Mens Quest Quick Dry Mesh Bottom Fly SAXX
Sale
The Carhartt Mens Base Force Midweight Poly-Wool Quarter-Zip Pocket Top is a long-sleeve, dark blue pullover featuring a chest pocket with a zipper and a small Carhartt logo patch.
Carhartt Mens Base Force Midweight Poly-Wool Quarter-Zip Pocket Top Carhartt
Sale
The Ortovox Mens 185 RockNWool LS Top is a men's gray merino wool base layer with long sleeves, a crew neck, and asymmetrical dark/light horizontal stripes. Ideal for winter tours, it features a small orange logo on the top left chest.
The Ortovox Mens 185 RockNWool LS Top features alternating green and olive stripes with solid green sleeves and a small left chest logo—perfect as a merino wool base layer for winter tours.
A man wearing the Smartwool Men’s Merino Sport 150 LS 1/4 Zip Top in gray with yellow-green side panels stands with hands clasped, looking aside. The athletic top features a front zipper and is paired with matching gray athletic pants.
A bearded man is wearing the Smartwool Men's Merino Sport 150 LS 1/4 Zip Top in gray and blue with black pants, standing and smiling against a plain white background.
Sale
The Simms Men's Lightweight Baselayer Top is a long-sleeve fishing shirt with black sleeves and a green-brown camouflage torso, shown flat on a white background.
The Simms Men's Lightweight Baselayer Top features dark gray sleeves, a black body, and the Simms logo on the left chest. This men's fishing shirt offers moisture-wicking performance for all-day comfort.
Sale
The Smartwool Men's Intraknit Merino 200 Crew is a long-sleeve, crewneck sweater in dark burgundy with black accents on the shoulders, elbows, and upper arms—ideal as a men's base layer for cold weather. Shown laid flat on a white background.
The Smartwool Mens Intraknit Merino 200 Crew is a long-sleeve, crew-neck base layer in dark maroon with black shoulder and elbow accents. Made from soft knit fabric, it's perfect for layering during cold-weather activities.
Sale
A person stands barefoot wearing Icebreaker Men's 200 ZoneKnit Leggings in olive green, featuring a form-fitting merino wool design and an elastic waistband branded with "icebreaker," highlighting this comfortable base layer.
A barefoot person wears Icebreaker Men's 200 Zoneknit Legging in bright blue, featuring a form-fitting merino wool design and branded waistband. The cropped image shows only the lower torso and legs. Ideal for temperature regulation.
Sale
Rab Mens Conduit Hoody Rab
Rab Mens Conduit Hoody Rab
Sale
Mens Outbound Half-Zip Sweatshirt Spyder
Mens Outbound Half-Zip Sweatshirt Spyder
Sale
An Artilect Men's Boulder 125 1/4 Zip Top in olive green with long sleeves, black side panels, and a small black zipper is laid flat. A label is on the lower left hem and another tag appears on the left sleeve.
The Artilect Men's Boulder 125 1/4 Zip Top is an ultralight, long-sleeve black pullover with a high collar, half-zip front, and a small label by the right hem, shown laid flat on a white background.
Sale
The Rab Mens Force Tee is a plain navy blue short-sleeved t-shirt with a small Rab logo on the left chest, shown laid flat on a white background. Ideal base layer for outdoor adventures.
Rab Mens Force Tee Rab
Sale
The Mons Royale Mens Temple Tech Hood Top is ideal for fitness multisport, featuring long sleeves, a quarter zip, "DOMINATE" on the right sleeve, and a small Reversal logo on the front lower left.
The Mons Royale Men's Temple Tech Hood Top features olive green sleeves and hood, a black body, half-zip front, and black text on the left sleeve—ideal for fitness multisport activities with versatile comfort.
Sale
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