Base Layers and Underwear

Category

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

Brand

ExOfficio
Icebreaker
Arc'teryx
Patagonia
Smartwool
MyPakage
Minus33
Ibex
Helly Hansen
Craft

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

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user rating: 4.5 of 5 (9)
ExOfficio Give-N-Go Boxer Brief Boxers, Briefs, Bikini
$16 - $26
user rating: 5 of 5 (2)
Icebreaker Oasis Long Sleeve Crewe Base Layer Top
$8 - $100
user rating: 5 of 5 (2)
Arc'teryx Rho LT Zip Neck Base Layer Top
$94 - $125
user rating: 5 of 5 (2)
Patagonia R1 Pants Base Layer Bottom
$19 - $119
user rating: 5 of 5 (2)
Smartwool Midweight Zip T Base Layer Top
$65 - $100
user rating: 5 of 5 (2)
Icebreaker Everyday Long Sleeve Crewe Base Layer Top
$70
user rating: 4.5 of 5 (3)
Smartwool Microweight Crew Base Layer Top
$63
user rating: 4.5 of 5 (3)
Smartwool Microweight Tee Base Layer Top
$52 - $59
user rating: 4.5 of 5 (2)
MyPakage Action Series Boxer Brief Boxers, Briefs, Bikini
$30
user rating: 5 of 5 (1)
Minus33 Acadian Lightweight Boxer Brief Boxers, Briefs, Bikini
$27
user rating: 5 of 5 (1)
Patagonia Capilene 2 Lightweight Crew Base Layer Top
$36 - $49
user rating: 5 of 5 (1)
Ibex Balance Briefs Boxers, Briefs, Bikini
$30
user rating: 5 of 5 (1)
Smartwool NTS Mid 250 Hoody Base Layer Top
$84
user rating: 5 of 5 (1)
Smartwool Midweight Crew Base Layer Top
$60 - $95
user rating: 5 of 5 (1)
Helly Hansen Fly Pant Base Layer Bottom
$22
user rating: 5 of 5 (1)
Icebreaker Siren Bra Sports Bra
$50
user rating: 5 of 5 (1)
ExOfficio Give-N-Go Lacy Bikini Boxers, Briefs, Bikini
$12 - $16
user rating: 5 of 5 (1)
Smartwool NTS Mid 250 Bottom Base Layer Bottom
$66 - $99
user rating: 5 of 5 (1)
Patagonia Capilene 3 Midweight Bottoms Base Layer Bottom
$28 - $59
user rating: 4 of 5 (4)
Smartwool Lightweight Zip T Base Layer Top
$65
user rating: 4.5 of 5 (1)
Patagonia Capilene Lightweight T-Shirt Base Layer Top
$31 - $39
user rating: 4.5 of 5 (1)
Craft Active Extreme 2.0 CN LS Top Base Layer Top
$80
user rating: 4.5 of 5 (1)
ExOfficio Give-N-Go Sport Mesh Brief Boxers, Briefs, Bikini
$16 - $26
user rating: 4.5 of 5 (1)
Patagonia Capilene Lightweight Bottoms Base Layer Bottom
$35 - $49
user rating: 4.5 of 5 (1)
Icebreaker Anatomica Brief Boxers, Briefs, Bikini
$35
user rating: 4.5 of 5 (1)
Airblaster Ninja Suit One-Piece Base Layer
$82 - $119
user rating: 4 of 5 (2)
Smartwool Midweight Bottom Base Layer Bottom
$67 - $95
user rating: 4 of 5 (2)
Marmot Midweight Zip LS Base Layer Top
$45
user rating: 4 of 5 (2)
Outdoor Research ActiveIce Sun Sleeves Arm or Leg Sleeves
$22 - $29
user rating: 4 of 5 (1)
SportHill Northwind Unders Boxers, Briefs, Bikini
$30 - $44
user rating: 4 of 5 (1)
ExOfficio Sol Cool Boxer Brief Boxers, Briefs, Bikini
$21 - $28
user rating: 4 of 5 (1)
Patagonia Capilene Daily T-Shirt Base Layer Top
$14 - $39
user rating: 4 of 5 (1)
Terramar Thermolator II Pant Base Layer Bottom
$15 - $26
user rating: 4 of 5 (1)
ExOfficio Give-N-Go Lacy Full Cut Brief Boxers, Briefs, Bikini
$15 - $16
user rating: 4 of 5 (1)
Icebreaker 200 Lightweight Legging Base Layer Bottom
$70
user rating: 3.5 of 5 (2)
ExOfficio Give-N-Go Boxer Boxers, Briefs, Bikini
$14 - $29
user rating: 3.5 of 5 (1)
Toad&Co Pacer Slim Long Sleeve Quarter Zip Base Layer Top
$49
user rating: 3 of 5 (2)
Icebreaker Oasis Crewe S/S Base Layer Top
$75 - $80
user rating: 2 of 5 (1)
Terramar Silk Pant Base Layer Bottom
$32
Sugoi SubZero Tight Base Layer Bottom
$100
Icebreaker Anatomica Crewe Base Layer Top
$64
Minus33 Tecumseh Midweight 3/4 Bottoms Base Layer Bottom
$60
REI Lightweight Base Layer Half-Zip Base Layer Top
$40
L.L.Bean Cresta Wool Ultralight 150 Long-Sleeve Base Layer Top
$59
Patagonia Capilene Daily Boxers Boxers, Briefs, Bikini
$17 - $35
L.L.Bean Silk Underwear, Crewneck Base Layer Top
$55
Rab Merino+ 120 Long Sleeve Tee Base Layer Top
$85
Icebreaker Siren Bikini Boxers, Briefs, Bikini
$20 - $30
Marmot Meghan Capri Base Layer Bottom
$31
Patagonia Capilene 2 Lightweight V-Neck
$36
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