Base Layers and Underwear

Category

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

Brand

Icebreaker
Arc'teryx
Patagonia
Smartwool
Coldpruf
Helly Hansen
ExOfficio
Marmot
Stoic
Under Armour

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 (2)
Icebreaker Oasis Long Sleeve Crewe Base Layer Top
$35 - $109
user rating: 5 of 5 (2)
Arc'teryx Rho LT Zip Neck Base Layer Top
$87 - $125
user rating: 5 of 5 (2)
Patagonia R1 Pants Base Layer Bottom
$26 - $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
$48 - $70
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
$79
user rating: 5 of 5 (1)
Smartwool Midweight Crew Base Layer Top
$60 - $95
user rating: 5 of 5 (1)
Coldpruf Platinum Pants Base Layer Bottom
$20
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
$14 - $16
user rating: 5 of 5 (1)
Smartwool NTS Mid 250 Bottom Base Layer Bottom
$47 - $94
user rating: 5 of 5 (1)
Patagonia Capilene 3 Midweight Bottoms Base Layer Bottom
$28 - $59
user rating: 5 of 5 (6)
Patagonia Capilene 2 Lightweight Zip-Neck Base Layer Top
user rating: 5 of 5 (3)
Icebreaker Bodyfit 150 Long Sleeve Crewe Base Layer Top
user rating: 5 of 5 (2)
Icebreaker 260 Midweight Tech Top Base Layer Top
$110 MSRP
user rating: 5 of 5 (2)
Marmot Lightweight Crew LS Base Layer Top
$45 MSRP
user rating: 5 of 5 (2)
Marmot Midweight Bottom Base Layer Bottom
$50 MSRP
user rating: 5 of 5 (2)
Patagonia Merino 2 Lightweight Crew Base Layer Top
$70 MSRP
user rating: 5 of 5 (2)
Patagonia Capilene 4 Expedition Weight Zip-Neck Base Layer Top
user rating: 5 of 5 (2)
Stoic Alpine Merino 150 Crew - Long-Sleeve Base Layer Top
user rating: 5 of 5 (2)
Under Armour ColdGear Fitted Legging Base Layer Bottom
$50 MSRP
user rating: 5 of 5 (1)
Minus33 Acadian Lightweight Boxer Brief Boxers, Briefs, Bikini
user rating: 5 of 5 (1)
Champion C9 Premium Boxer Briefs Boxers, Briefs, Bikini
user rating: 5 of 5 (1)
Kora Shola 230 Crew Base Layer Top
$145 MSRP
user rating: 5 of 5 (1)
Terramar Mesh Pro Boxer Brief 6" Boxers, Briefs, Bikini
$18 MSRP
user rating: 5 of 5 (1)
Stoic Merino 200 1-Z Suit One-Piece Base Layer
user rating: 5 of 5 (1)
Ibex Balance Briefs Boxers, Briefs, Bikini
$25 MSRP
user rating: 5 of 5 (1)
Fjallraven Bergtagen Longjohns Base Layer Bottom
$140 MSRP
user rating: 5 of 5 (1)
Mountain Hardwear Power Stretch Zip T Base Layer Top
$95 MSRP
user rating: 5 of 5 (1)
Polarmax Tech Silk Crew Base Layer Top
$30 MSRP
user rating: 5 of 5 (1)
Voormi Thermal ll Baselayer Top Base Layer Top
$129 MSRP
user rating: 5 of 5 (1)
Omni-Wool Midweight Crew Base Layer Top
$35 MSRP
user rating: 5 of 5 (1)
REI Midweight Polartec Power Dry Zip-T Base Layer Top
$37 MSRP
 
user rating: 5 of 5 (1)
Duofold Orginal Union Suit
user rating: 5 of 5 (1)
Patagonia Capilene 1 Silkweight Scoop Base Layer Top
$45 MSRP
user rating: 5 of 5 (1)
Patagonia Merino Air Bottoms Base Layer Bottom
user rating: 5 of 5 (1)
Adidas Sport Performance Flex 360 Boxer Brief Boxers, Briefs, Bikini
user rating: 5 of 5 (1)
Ibex Woolies 2 Bottom Base Layer Bottom
user rating: 5 of 5 (1)
Beyond Clothing Aether Crew Base Layer Top
$75 MSRP
user rating: 5 of 5 (1)
New Balance Performance Underwear 9 Inch Inseam Boxer Brief Boxers, Briefs, Bikini
user rating: 5 of 5 (1)
Woolx Everyday Long Sleeve Crew 230 Midweight Base Layer Top
$74 MSRP
user rating: 5 of 5 (1)
Smartwool Midweight Turtleneck Base Layer Top
$85 MSRP
user rating: 5 of 5 (1)
Ortovox Merino 130 Short Sleeve Base Layer Top
$82 MSRP
user rating: 5 of 5 (1)
Terramar Hot Totties Grid Fleece Tights Base Layer Bottom
user rating: 5 of 5 (1)
Patagonia Merino 3 Midweight Hoody Base Layer Top
$125 MSRP
user rating: 5 of 5 (1)
Avalanche Wear Mogul Fleece Legging Base Layer Bottom
$50 MSRP
user rating: 5 of 5 (1)
Coldpruf Platinum II Pant Base Layer Bottom
$33 MSRP
 
user rating: 5 of 5 (1)
Terramar EC2 Transport
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