Base Layers and Underwear

Category

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

Brand

other
66°North
686
Adidas
Airblaster
Altra
Arc'teryx
Armada
Avalanche Wear
Backcountry.com

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: 5 of 5 (1)
Champion C9 Premium Boxer Briefs Boxers, Briefs, Bikini
66°North Vik Tights Base Layer Bottom
$120
686 Airhole Thermal Airtube Top Base Layer Top
686 Airhole Thermal Bala Top Base Layer Top
686 Airhole Thermal One Piece One-Piece Base Layer
686 Therma Base Base Layer Top
686 Therma Base Full Length Base Layer Bottom
user rating: 5 of 5 (1)
Adidas Sport Performance Flex 360 Boxer Brief Boxers, Briefs, Bikini
Airblaster Hoodless Ninja Suit One-Piece Base Layer
$100 - $109
Airblaster Merino Ninja Suit One-Piece Base Layer
$190 - $199
Airblaster Merino Wool Ninja Suit One-Piece Base Layer
$190 - $199
Airblaster Ninja Shirt Base Layer Top
user rating: 4.5 of 5 (1)
Airblaster Ninja Suit One-Piece Base Layer
$84 - $119
Airblaster Sumo Suit One-Piece Base Layer
 
Altra Interval I Calf Sleeve Arm or Leg Sleeves
Arc'teryx Phase AR Bottom Base Layer Bottom
$12 - $90
Arc'teryx Phase AR Crew LS Base Layer Top
$60 - $79
Arc'teryx Phase AR Zip-Neck LS Base Layer Top
$62 - $89
Arc'teryx Phase SL Bottom Base Layer Bottom
$75 - $185
Arc'teryx Phase SL Boxer Boxers, Briefs, Bikini
$38 - $45
Arc'teryx Phase SL Bra Sports Bra
$32 - $45
Arc'teryx Phase SL Brief Boxers, Briefs, Bikini
$39
Arc'teryx Phase SL Camisole Base Layer Top
$29 - $49
Arc'teryx Phase SL Crew LS Base Layer Top
$45 - $75
Arc'teryx Phase SL Crew SS Base Layer Top
$40 - $69
Arc'teryx Phase SL Zip Neck Base Layer Top
$63 - $85
Arc'teryx Phase SV Boot Cut Base Layer Bottom
$69 MSRP
Arc'teryx Phase SV Bottom Base Layer Bottom
$79
Arc'teryx Phase SV Crew LS Base Layer Top
$69 MSRP
Arc'teryx Phase SV CZ Bottom Base Layer Bottom
$60
Arc'teryx Rho AR Bottom Base Layer Bottom
$74 - $125
Arc'teryx Rho LT Boot Cut Base Layer Bottom
$59 - $79
Arc'teryx Rho LT Bottom Base Layer Bottom
$89
user rating: 5 of 5 (2)
Arc'teryx Rho LT Zip Neck Base Layer Top
$119 - $125
Arc'teryx Rho LTW Zip Base Layer Top
$129 MSRP
Arc'teryx Satoro AR Bottom Base Layer Bottom
$109
Arc'teryx Satoro AR Boxer Boxers, Briefs, Bikini
$59
Arc'teryx Satoro AR Crew LS Base Layer Top
$119
Arc'teryx Satoro AR Zip LS Base Layer Top
$139
Arc'teryx Satoro SV Zip Neck LS Base Layer Top
$159
Arc'teryx Stryka Hoodie Base Layer Bottom
Armada Contra Merino Crew Long-Sleeve Base Layer Top
Armada Contra Merino Pant Base Layer Bottom
user rating: 5 of 5 (1)
Avalanche Wear Mogul Fleece Legging Base Layer Bottom
$50 MSRP
user rating: 3 of 5 (4)
Avalanche Wear Mogul Pant Base Layer Bottom
$50 MSRP
Backcountry.com Backcountry Lightweight 3/4 Base Layer Bottom
Backcountry.com Lightweight Crew Neck Base Layer Top
Backcountry.com LIghtweight Snap Henley Neck Base Layer Top
Backcountry.com Merino 150 Base Layer Long Sleeve
Backcountry.com Midweight Zip Neck Top
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