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
Helly Hansen
Fjallraven
Airblaster
Marmot

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

Helly Hansen LIFA Merino Pant

rated 4.5 of 5 stars An excellent base layer choice from a company that understands cold and wet weather. The HH LIFA Merino 2-layer construction keeps you warm and dry in all kinds of conditions, and feels great when wearing it. Watch out for the “athletic” fit when purchasing, but if you get the right fit this base layer will keep you comfortable in rain, sleet, and snow well below freezing. Note that this is a companion review with the Helly Hansen LIFA Merino 1/2 Zip top.Product Description Helly Hansen (HH)… Full review

Helly Hansen LIFA Merino 1/2 Zip

rated 4.5 of 5 stars An excellent base layer choice from a company that understands cold and wet weather. The HH LIFA Merino 2-layer construction keeps you warm and dry in all kinds of conditions, and feels great when wearing it. Watch out for the “athletic” fit when purchasing, but if you get the right fit this base layer will keep you comfortable in rain, sleet, and snow well below freezing. Note: This is a companion review along with the Helly Hansen LIFA Merino Pant. Product Description Helly Hansen (HH) LIFA… Full review

Fjallraven Bergtagen Longjohns

rated 5 of 5 stars The Fjallraven Bergtagen Long Johns is a base layer pant that utilizes wool in three different weaves to maximize heat retention in key areas (butt, groin) and breathability in others (thighs, calves). It’s a total home run of execution and since I received this base layer for testing I have worn nothing else. It’s exceptionally well tailored, durable, doesn’t stink on multi-day trips, and you’ll have no fear around a fire. The only possible negatives are more inherent to wool, than this… Full review

Fjallraven Bergtagen Woolmesh Sweater

rated 5 of 5 stars The Fjallraven Bergtagen Woolmesh Sweater is a base layer top that utilizes wool in three different weaves to maximize heat retention in key areas (chest, back) and breathability in others (stomach, underarms). It’s a total home run of execution and since I received this top for testing I have worn nothing else. It’s exceptionally well tailored, durable, doesn’t stink on multi-day trips, and you’ll have no fear around a fire. The only possible negatives are more inherent to wool, than this… Full review

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

Top-Rated Base Layers and Underwear

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

user rating: 4.5 of 5 (9)
ExOfficio Give-N-Go Boxer Brief Boxers, Briefs, Bikini
$16 - $29
user rating: 5 of 5 (2)
Icebreaker 260 Midweight Tech Top Base Layer Top
$59
user rating: 5 of 5 (2)
Icebreaker Oasis Long Sleeve Crewe Base Layer Top
$39 - $108
user rating: 5 of 5 (2)
Arc'teryx Rho LT Zip Neck Base Layer Top
$119 - $125
user rating: 5 of 5 (2)
Patagonia R1 Pants Base Layer Bottom
$23 - $119
user rating: 5 of 5 (2)
Smartwool Midweight Zip T Base Layer Top
$70 - $100
user rating: 5 of 5 (2)
Icebreaker Everyday Long Sleeve Crewe Base Layer Top
$48 - $70
user rating: 4.5 of 5 (3)
Smartwool Microweight Crew Base Layer Top
$55
user rating: 4.5 of 5 (3)
Smartwool Microweight Tee Base Layer Top
$37 - $51
user rating: 4.5 of 5 (2)
MyPakage Action Series Boxer Brief Boxers, Briefs, Bikini
$30
user rating: 5 of 5 (1)
Patagonia Capilene 2 Lightweight Crew Base Layer Top
$36 - $49
user rating: 5 of 5 (1)
Smartwool NTS Mid 250 Hoody Base Layer Top
$71
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
$24
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
$13 - $16
user rating: 5 of 5 (1)
Smartwool NTS Mid 250 Bottom Base Layer Bottom
$47 - $94
user rating: 5 of 5 (1)
Fjallraven Bergtagen Woolmesh Sweater Base Layer Top
$120
user rating: 5 of 5 (1)
Patagonia Capilene 3 Midweight Bottoms Base Layer Bottom
$26 - $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
$27 - $39
user rating: 4.5 of 5 (1)
ExOfficio Give-N-Go Sport Mesh Brief Boxers, Briefs, Bikini
$13 - $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
$84 - $119
user rating: 4 of 5 (2)
Smartwool Midweight Bottom Base Layer Bottom
$62 - $95
user rating: 4 of 5 (2)
Marmot Midweight Zip LS Base Layer Top
$60
user rating: 4 of 5 (2)
Outdoor Research ActiveIce Sun Sleeves Arm or Leg Sleeves
$29
user rating: 4 of 5 (1)
SportHill Northwind Unders Boxers, Briefs, Bikini
$22 - $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
$20 - $39
user rating: 4 of 5 (1)
Terramar Thermolator II Pant Base Layer Bottom
$15 - $17
user rating: 4 of 5 (1)
ExOfficio Give-N-Go Lacy Full Cut Brief Boxers, Briefs, Bikini
$7 - $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
$18 - $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
$80
Icebreaker Tech Long Sleeve Crewe Base Layer Top
$25
Sugoi SubZero Tight Base Layer Bottom
$100
Montane Primino 140 Long Janes Base Layer Bottom
$90
Icebreaker Anatomica Crewe Base Layer Top
$210
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
$25 - $35
L.L.Bean Silk Underwear, Crewneck Base Layer Top
$55
Rab Merino+ 120 Long Sleeve Tee Base Layer Top
$85
Montane VIA Armguard Arm or Leg Sleeves
$35
Icebreaker Siren Bikini Boxers, Briefs, Bikini
$17 - $30
Marmot Meghan Capri Base Layer Bottom
$22 - $31
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