Base Layers and Underwear

Category

Tops
Bottoms
One-Piece Base Layers
Boxers, Briefs, Bikinis
Sports Bras
Arm and Leg Sleeves

Brand

Icebreaker
Marmot
ExOfficio
Polarmax
Patagonia
Under Armour
Smartwool
REI
Terramar
Moving Comfort

User

Unisex
Men's
Women's
Kids'
Boys'
Girls'

Price

less than $25
$25 - $49.99
$50 - $99.99
$100 - $199.99
$200 - $299.99
$300 - $399.99
$400 - $499.99
$500 and above

Recent Base Layer Reviews

Ridge Merino Inversion Heavyweight Crew

rated 5 of 5 stars A merino wool baselayer that is soft and warm. Perfect for cold-weather activities of all kinds. Fit and Comfort: Finally, a baselayer top that has a little extra length in the sleeves and torso and stays in place, no matter the activity. I’ve worn several merino products over the years and this is as comfortable as any that I’ve worn with a soft-to-the-skin and no-itch feeling. This top fits close but not restrictively tight to the body. The length of the torso and arms are both generous, meaning… Full review

Ridge Merino Inversion Heavyweight Bottoms

rated 4 of 5 stars A warm and comfortable pair of baselayer pants that work particularly well below freezing temps, but they do have sizing limitations. Fit and Comfort: At 6’2” and 190 lbs. (1.88m and 86.2 kg), I typically wear pants with a 31” or 32” waist and a 34” inseam. I tested a men’s medium size, due to its accurate waist size, realizing that the length might be slightly shorter than desired, according to the manufacturer’s sizing chart. In fact, I’d have to jump up two sizes to a men’s… Full review

Toad&Co Pacer Slim Long Sleeve Quarter Zip

rated 3.5 of 5 stars A versatile garment from a philanthropically-minded company that strikes a compromise between backcountry base layer and in-town casual wear. With grime-concealing colors and a poly-wool blend, the Pacer Quarter Zip is a thermoregulating, moisture-wicking, low-odor option for travelers with limited wardrobe space and for anyone who doesn't mind giving up some performance or style for a garment that offers a viable trail-to-town option. A Trail-to-Town Quarter Zip The Toad & Co. Pacer Slim Long… Full review

Helly Hansen Women's HH Wool LS Crew

rated 3.5 of 5 stars Sturdy, warm, and straightforward. This is not the most comfortable wool base layer out there, but it performs beautifully in terms of fit, warmth, and durability. This top is well made and will keep you warm. No bells, no whistles. Fit & Comfort - Fit in arms, shoulders, and torso is true to size, keeping in mind that the desired fit of this top is very snug. I'd recommend trying it on before buying if you have concerns about the sizing. The wool was fine on my skin, but other backpackers found… Full review

Smartwool Men's NTS Mid 250 Hoody

rated 5 of 5 stars One of my favorite pieces of clothing. Perfect balance of warmth, comfort, and style. This is one of my favorite pieces of clothing. I wear it all the time. It fits just right. Not too tight, not too loose. Feels comfortable against the skin and breathes well.  I'm 6'2" 225 lbs. and the XL was perfect. It is plenty long in the sleeves and torso. Stretchy, but not constricting. I have used it both as a base layer and as a standalone top in milder weather. It layers well. The hood is a little loose,… Full review

Woolx Everyday Long Sleeve Crew 230 Midweight

rated 5 of 5 stars The WoolX men's Everyday Long Sleeve Crew, 230 Midweight Top (X506-302) has become, without any doubt, my favorite base layer top. I wear it frequently, pretty much year round, as a stand-alone layer, or beneath other layers and outerwear. It is incredibly comfortable, has great warmth and wicking capability, and has held up well for over a year of use and washings. Definitely recommend investing in this top!                                                    … Full review

Craft Men's Active Extreme 2.0 CN LS Top

rated 4.5 of 5 stars An awesome baselayer from Craft. The Active Extreme 2.0 CN LS is NOT a thermal baselayer even though according to the company's graph it's best suited for elite athletes doing high intensity activities in temps hovering at -10° Celsius... ...ooorr just any other regular dude that sweats doing some very light backpacking @16-17° Celsius and 77% humidity in Crete (lol).It feels warm when in sunlight due to the black color, but when in shade the temp drops instantly! I mean this thing really cools… Full review

ExOfficio Give-N-Go Boxer Brief

rated 5 of 5 stars 6-star underwear! Would give six stars if I could. Have owned two pairs for about five years now. Initially purchased for treks to avoid the dreaded chafing. They are now used for any athletic venture. Quality: Two pair that have lasted five years, that alone is impressive. Material is kind on the skin, stretches well, but stays on the body.   Comfort: Have worn on 15-mile hikes, lots of sweating and ZERO chafing. They wick moisture amazingly and keep their form after a long day. Breathable: No… Full review

Avalanche Wear Mogul Pant

rated 1 of 5 stars These used to be my go-to pants. They were fantastic until they changed the fabric years ago and made them in China. I just bought these pants after years of refusing to buy them for years because of the terrible pilling and their latest product is worse than ever. They pilled immediately. I bought Athletica Polartec at the same time and there is no pilling. I am so disappointed because 15 years ago when they were made in Canada they were fantastic. Why don't companies listen to their consumer reviews? Full review

Top-Rated Base Layers and Underwear

Sort by: name | rating | price | availability | recently reviewed

Icebreaker Oasis Legless Base Layer Bottom
$5 - $80
Marmot ThermalClime Pro LS 1/2 Zip Base Layer Top
$6 - $10
user rating: 5 of 5 (2)
Icebreaker Oasis Long Sleeve Crewe Base Layer Top
$8 - $100
ExOfficio Give-N-Go Bikini Brief Boxers, Briefs, Bikini
$10 - $25
ExOfficio Give-N-Go String Bikini Boxers, Briefs, Bikini
$10 - $25
user rating: 5 of 5 (1)
ExOfficio Give-N-Go Lacy Bikini Boxers, Briefs, Bikini
$11 - $16
Polarmax Maxride Pants Base Layer Bottom
$11 - $14
ExOfficio Give-N-Go Sport Brief Boxers, Briefs, Bikini
$11 - $14
ExOfficio Give-N-Go Lacy Low Rise Bikini Boxers, Briefs, Bikini
$11 - $14
ExOfficio Give-N-Go Full Cut Brief Boxers, Briefs, Bikini
$11 - $20
Patagonia Barely Hipster Boxers, Briefs, Bikini
$11 - $22
Patagonia Barely Thong Boxers, Briefs, Bikini
$11 - $22
Patagonia Active Hipster Boxers, Briefs, Bikini
$12 - $24
Patagonia Active Briefs Boxers, Briefs, Bikini
$12 - $24
ExOfficio Give-N-Go Lacy Thong Boxers, Briefs, Bikini
$12 - $13
Patagonia Capilene Bottom Base Layer Bottom
$13
Patagonia Barely Bikini Boxers, Briefs, Bikini
$13 - $22
ExOfficio Give-N-Go Brief Boxers, Briefs, Bikini
$14 - $25
Under Armour Original Series 6-inch Boxerjock Boxers, Briefs, Bikini
$14 - $20
Polarmax Maxride Crew Base Layer Top
$14
Smartwool Microweight Thong Boxers, Briefs, Bikini
$14
 
Patagonia Capilene Team T-Shirt Base Layer Top
$14
Patagonia Capilene Daily Boxer Briefs Boxers, Briefs, Bikini
$14 - $29
Icebreaker Oasis Long Sleeve V Base Layer Top
$14 - $66
ExOfficio Give-N-Go Cross Over Bra Sports Bra
$14 - $25
user rating: 3.5 of 5 (2)
ExOfficio Give-N-Go Boxer Boxers, Briefs, Bikini
$14 - $29
REI Heavyweight Half-Zip Long Underwear Top Base Layer Top
$15
ExOfficio Give-N-Go Tank Top Base Layer Top
$15 - $30
Smartwool Microweight Brief Boxers, Briefs, Bikini
$15
 
Polarmax Tech Silk Boxer Boxers, Briefs, Bikini
$15
user rating: 4 of 5 (1)
Terramar Thermolator II Pant Base Layer Bottom
$15 - $26
Marmot ThermalClime Pro LS Crew Base Layer Top
$15 - $48
user rating: 4 of 5 (1)
ExOfficio Give-N-Go Lacy Full Cut Brief Boxers, Briefs, Bikini
$15 - $16
Under Armour HeatGear Legging Base Layer Bottom
$15 - $24
user rating: 4.5 of 5 (1)
ExOfficio Give-N-Go Sport Mesh Brief Boxers, Briefs, Bikini
$16 - $25
user rating: 4.5 of 5 (9)
ExOfficio Give-N-Go Boxer Brief Boxers, Briefs, Bikini
$16 - $26
Patagonia Active Boy Short Boxers, Briefs, Bikini
$16 - $29
Smartwool PhD Compression Calf Sleeve Arm or Leg Sleeves
$16 - $34
Moving Comfort Workout Bikini Boxers, Briefs, Bikini
$16 MSRP
REI Mesh MTS Briefs Base Layer Bottom
$19
Icebreaker Oasis Long Sleeve Half Zip Hood Base Layer Top
$17
Terramar Silk Pointelle Scoop Base Layer Top
$17
Polarmax Double Base Layer Pant Base Layer Bottom
$17 - $22
L.L.Bean Wicked Warm Midweight Underwear, Top Base Layer Top
$17
L.L.Bean Wicked Warm Midweight Underwear, Pants Base Layer Bottom
$17
user rating: 4 of 5 (1)
Patagonia Capilene Daily T-Shirt Base Layer Top
$17 - $39
Patagonia Capilene Daily Boxers Boxers, Briefs, Bikini
$17 - $35
user rating: 5 of 5 (1)
Patagonia Capilene 3 Midweight Bottoms Base Layer Bottom
$17 - $59
ExOfficio Give-N-Go Shelf Bra Camisole Sports Bra
$17 - $25
Mammut Go Dry Boxer Boxers, Briefs, Bikini
$18
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