Base Layers and Underwear

Category

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

Brands

Ridge Merino
U.S. Armed Forces
MyPakage
Sherpa Adventure Gear
Kora
Terramar
ExOfficio
Patagonia
New Balance
Stoic

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 and above

Recent Base Layer Reviews

Ridge Merino Inversion Midweight Bottoms

rated 4.5 of 5 stars These high quality, high performance mid-weight base layer bottoms perform without adding unnecessary bulk! Unrestrictive and warm, Ridge’s new base layer line is ideal for people who have an active outdoor lifestyle. Whether skiing, backpacking, or even doing outdoor chores, the merino wool Inversion will help regulate temperature regardless of the conditions! A winter afternoon walk with Otto SPECS 18.5 micron merino wool 190g weight UPF 50+ 100% recycled polyester waistband Flatlocked seams… Full review

Avalanche Wear Women's Mogul Fleece Legging

rated 5 of 5 stars Where I live temperatures can drop well below zero I have never even thought about wearing a second pair of pants. The inner fleece lining is super soft and wicks moisture away from your skin also blocks wind. Washes well without breaking down. I've had my pair for two years and they're still my go-to winter running pants. Stretch as well when running. I have the woman's version of these pants, but could not find them on the site and wanted to express how much I truly love these pants. Full review

U.S. Armed Forces Gen III, Level 2 ECWCS Top

rated 5 of 5 stars U.S. made Polartec Power Grid fleece top for $20. Compare to the $100 Patagonia R1 which is now made overseas. I find myself wearing the level 2 grid fleece top (aka waffle top) more than any other garment when playing outdoors. Here's why: Ultra breathable Great wicking properties Warm, even as an outer layer Versatile: can be used effectively as a base, mid, or outer layer Thumb holes to facilitate the donning of other layers Half zip for venting Even if I do sweat while wearing this, the impressive… Full review

MyPakage Pro Series 2-in-1

rated 5 of 5 stars Pro series long underwear and athletic shorts in one package. The unique MyPakage 3 dimensional pouch protects your precious parts. Unless you have worn MyPakage underwear, you are really missing a great experience. Utilizing their 3-dimensional keyhole technology pouch that surrounds your package, they give you the best feeling underwear on the planet. There is no more adjusting your package because the pouch keeps everything nicely tucked away and not in constant contact with your legs. Forget… Full review

Terramar Men's Silk Pant

rated 2 of 5 stars Great pajamas, poor base layer. Thermasilk base layer from Terramar is not adequate for outdoor sports or any type of physical activity: It is far too weak and fragile. It is too thin to provide any warmth, and when wet, they feel cold. They will rip and shred if worn in an endurance sports or hard work setting. Also, they do not hold their shape. Hand-washing brings back their original shape, but they become limp after a couple of days out in the field. On the other hand, they make the best pajamas,… Full review

Sherpa Adventure Gear Men's Baans Tech Quarter Zip

rated 4.5 of 5 stars Used this for basecamp warmth after hiking 7 to 9 hours in the fall Maine weather. After hiking all day relied on this to stay warm while setting up campsite and in the cool fall Maine mornings to stay warm while breaking down. Keeps you extremely warm and comfortable during these critical times. This pullover fits great and is extremely comfortable after a long day of hard hiking. Provides essential warmth in the cool fall Maine weather after a great day's hiking, or in the early cold fall mornings. Full review

Kora Shola 230 Crew

rated 5 of 5 stars Warm, soft, well-fitting, comfortable even in warmer temperatures. It's been years since I've lived in a climate cold enough for a base layer. Actually it's been 13 years... I remember them as itchy, uncomfortable, and most of the time I would rather freeze than wear them. I definitely have needed them since returning, and I decided to bite the bullet and pick up a set for the upcoming winter, which the Farmer's Almanac says will be one of the coldest winters in some time. I typically would not… Full review

Patagonia Men's Capilene 2 Lightweight Zip-Neck

rated 4.5 of 5 stars Super lightweight at 6.5 oz. Very quick dry. Super open breathability without giving up warmth. Great light, breathable, super quick dry base layer. Fits snug to body, but doesn't stick. Allows for easy layering without that cramped tight feeling. Don't leave home without it!!!! Full review

Terramar Mesh Pro Boxer Brief 6"

rated 5 of 5 stars Unbelievable! Great value and extremely comfortable! These Terramar High Performance Boxer Briefs were a lifesaver. Not only did they fit great, they were easy to wash, dried out fast, and provided plenty of support on those long day hikes. Did I mention they are less expensive than most of the other odor-eliminating briefs I came across as well? If you are looking for new briefs give these a shot. You will not be disappointed. Full review

Top-Rated Base Layers and Underwear

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

user rating: 4.5 of 5 (1)
Ridge Merino Inversion Midweight Bottoms reviewed Feb 9, 2017
$50 MSRP
user rating: 5 of 5 (1)
U.S. Armed Forces Gen III, Level 2 ECWCS Top reviewed Jan 3, 2017
user rating: 5 of 5 (1)
MyPakage Pro Series 2-in-1 reviewed Dec 12, 2016
$90 MSRP
user rating: 4.5 of 5 (1)
Sherpa Adventure Gear Baans Tech Quarter Zip reviewed Oct 13, 2016
$25
user rating: 5 of 5 (1)
Kora Shola 230 Crew reviewed Sep 26, 2016
$145 MSRP
user rating: 5 of 5 (1)
Terramar Mesh Pro Boxer Brief 6" reviewed Sep 7, 2016
$18 MSRP
user rating: 5 of 5 (1)
ExOfficio Give-N-Go Lacy Bikini reviewed Sep 2, 2016
$11 - $23
user rating: 4.5 of 5 (1)
Kora Shola 230 Zip reviewed Aug 4, 2016
$160 MSRP
user rating: 4.5 of 5 (2)
MyPakage Action Series Boxer Brief reviewed Jul 29, 2016
$40
user rating: 3.5 of 5 (2)
ExOfficio Give-N-Go Boxer reviewed Jul 21, 2016
$13 - $26
user rating: 4.5 of 5 (1)
Patagonia Capilene Lightweight Bottoms reviewed Jul 10, 2016
$24 - $49
user rating: 5 of 5 (7)
ExOfficio Give-N-Go Boxer Brief reviewed Jan 2, 2016
$13 - $30
user rating: 5 of 5 (1)
New Balance Performance Underwear 9 Inch Inseam Boxer Brief reviewed Nov 29, 2015
user rating: 4 of 5 (1)
Patagonia Capilene 1 Silkweight Crew reviewed Nov 19, 2015
$39
user rating: 5 of 5 (2)
Stoic Merino 200 Boxer Brief reviewed Nov 16, 2015
discontinued
 
user rating: 5 of 5 (1)
Patagonia Merino Air Bottoms reviewed Nov 9, 2015
$77
user rating: 4 of 5 (3)
Avalanche Wear Mogul Pant reviewed Oct 7, 2015
$50 MSRP
user rating: 5 of 5 (1)
Patagonia Merino Air Hoody reviewed Sep 30, 2015
$74
user rating: 4.5 of 5 (1)
Icebreaker Bodyfit 260 Olympia Crewe reviewed Sep 24, 2015
discontinued
user rating: 4.5 of 5 (1)
ExOfficio Give-N-Go Sport Mesh Brief reviewed Sep 20, 2015
$19 - $26
user rating: 3.5 of 5 (1)
Outdoor Research ActiveIce Sun Sleeves reviewed Jul 22, 2015
$29
user rating: 5 of 5 (1)
Patagonia Merino 3 Midweight Hoody reviewed May 21, 2015
$98 - $140
user rating: 5 of 5 (1)
Mountain Equipment Crux LS Crew reviewed Mar 3, 2015
user rating: 4 of 5 (1)
Woolx X704 reviewed Mar 2, 2015
$170 MSRP
user rating: 5 of 5 (1)
Smartwool Midweight Turtleneck reviewed Sep 29, 2014
$85 MSRP
user rating: 5 of 5 (1)
First Lite Chama Hoody reviewed Jun 5, 2014
user rating: 5 of 5 (1)
Adidas Sport Performance Flex 360 Boxer Brief reviewed Apr 22, 2014
user rating: 4 of 5 (1)
Under Armour Original Series 9-inch Boxerjock reviewed Mar 11, 2014
$20
user rating: 4.5 of 5 (3)
Smartwool Microweight Crew reviewed Feb 2, 2014
$49 - $75
user rating: 5 of 5 (1)
Smartwool Midweight Crew reviewed Jan 22, 2014
$42 - $105
user rating: 2.5 of 5 (1)
Wild Country Lightweight Base Layer Top reviewed Jan 1, 2014
user rating: 5 of 5 (3)
Icebreaker Bodyfit 150 Long Sleeve Crewe reviewed Dec 21, 2013
user rating: 4.5 of 5 (1)
Verve Cassandra Bra reviewed Oct 9, 2013
$38 MSRP
user rating: 4 of 5 (1)
RedRam Merino Legging reviewed Oct 5, 2013
user rating: 5 of 5 (1)
Ibex Swerve Long Sleeve Top reviewed Oct 2, 2013
discontinued
user rating: 4.5 of 5 (1)
Mountain Hardwear WayCool Arms reviewed Jun 20, 2013
$17
user rating: 5 of 5 (1)
Champion C9 Premium Boxer Briefs reviewed May 16, 2013
user rating: 5 of 5 (2)
Patagonia Merino 2 Lightweight Crew reviewed Apr 25, 2013
$48 - $90
user rating: 3 of 5 (1)
Terramar SmartSilk Crew reviewed Mar 7, 2013
$60 MSRP
user rating: 4.5 of 5 (1)
Icebreaker GT 200 L/S Chase Zip reviewed Feb 13, 2013
discontinued
user rating: 2.5 of 5 (1)
Terramar Hot Totties Fleece Heavy Footy Performance Leggings reviewed Feb 9, 2013
user rating: 5 of 5 (1)
Terramar Hot Totties Grid Fleece Tights reviewed Feb 9, 2013
user rating: 5 of 5 (2)
Under Armour ColdGear Fitted Legging reviewed Feb 6, 2013
$50 MSRP
user rating: 4 of 5 (2)
Terramar SmartSilk Tights reviewed Mar 7, 2013
$60 MSRP
 
user rating: 5 of 5 (1)
Terramar EC2 Transport reviewed Jan 31, 2013
 
user rating: 5 of 5 (1)
Terramar TXO 3.0 Body-Sensors reviewed Jan 31, 2013
user rating: 4.5 of 5 (4)
Icebreaker 260 Midweight LS Crewe reviewed Aug 8, 2013
$100 MSRP
user rating: 4.5 of 5 (1)
Icebreaker Anatomica Brief reviewed Jan 20, 2013
$26 - $35
user rating: 5 of 5 (1)
Patagonia Capilene 3 Midweight Bottoms reviewed Jan 19, 2013
$21 - $59
user rating: 3 of 5 (1)
Gordini Silkweight Briefs reviewed Jan 18, 2013
discontinued
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