Base Layers and Underwear

Category

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

Brands

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

Outdoor Research ActiveIce Sun Sleeves

rated 5 of 5 stars Out of all the clothes I’ve used for hiking this is by far the cleverest, well executed, and best functional garment I had. I hiked over 1,000 miles with those sleeves, and did it in blazing sun, high altitude high radiation, and hot conditions. I have very white sensitive skin, and I was appalled by the thought of carrying and applying sun screen for the whole trip. Fortunately I came across the ActiveIce Sun Sleeves that offered the ideal solution for sun protection. Pros: Blocks the sun! It… Full review

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

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
$33 - $41
686 Airhole Thermal Bala Top Base Layer Top
$30
686 Airhole Thermal One Piece One-Piece Base Layer
$50 - $55
686 Therma Base Base Layer Top
$35
686 Therma Base Full Length Base Layer Bottom
$25
user rating: 5 of 5 (1)
Adidas Sport Performance Flex 360 Boxer Brief Boxers, Briefs, Bikini
Airblaster Hoodless Ninja Suit One-Piece Base Layer
$110
Airblaster Merino Ninja Suit One-Piece Base Layer
$190
Airblaster Merino Wool Ninja Suit One-Piece Base Layer
Airblaster Ninja Shirt Base Layer Top
$58
Airblaster Ninja Suit One-Piece Base Layer
$60
Airblaster Sumo Suit One-Piece Base Layer
 
Altra Interval I Calf Sleeve Arm or Leg Sleeves
$35
Arc'teryx Phase AR Bottom Base Layer Bottom
$45 - $79
Arc'teryx Phase AR Crew LS Base Layer Top
$55 - $79
Arc'teryx Phase AR Zip-Neck LS Base Layer Top
$47 - $89
Arc'teryx Phase SL Bottom Base Layer Bottom
$69 - $75
Arc'teryx Phase SL Boxer Boxers, Briefs, Bikini
$27 - $45
Arc'teryx Phase SL Bra Sports Bra
$27 - $45
Arc'teryx Phase SL Brief Boxers, Briefs, Bikini
$26 - $39
Arc'teryx Phase SL Camisole Base Layer Top
$20 - $49
Arc'teryx Phase SL Crew LS Base Layer Top
$52 - $75
Arc'teryx Phase SL Crew SS Base Layer Top
$39 - $169
Arc'teryx Phase SL Zip Neck Base Layer Top
$85
Arc'teryx Phase SV Boot Cut Base Layer Bottom
$69 MSRP
Arc'teryx Phase SV Bottom Base Layer Bottom
$44 - $79
Arc'teryx Phase SV Crew LS Base Layer Top
$69 MSRP
Arc'teryx Phase SV CZ Bottom Base Layer Bottom
Arc'teryx Rho AR Bottom Base Layer Bottom
$125
Arc'teryx Rho LT Bottom Base Layer Bottom
$62 - $89
user rating: 5 of 5 (2)
Arc'teryx Rho LT Zip Neck Base Layer Top
$87 - $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 Stryka Hoodie Base Layer Bottom
$149
Armada Contra Merino Crew Long-Sleeve Base Layer Top
$50
Armada Contra Merino Pant Base Layer Bottom
$52
user rating: 5 of 5 (1)
Avalanche Wear Mogul Fleece Legging Base Layer Bottom
$50 MSRP
user rating: 4 of 5 (3)
Avalanche Wear Mogul Pant Base Layer Bottom
$50 MSRP
Backcountry.com Backcountry Lightweight 3/4 Base Layer Bottom
$26 - $29
Backcountry.com Lightweight Crew Neck Base Layer Top
$29 - $31
Backcountry.com LIghtweight Snap Henley Neck Base Layer Top
$32 - $34
Backcountry.com Merino 150 Base Layer Long Sleeve
Backcountry.com Midweight Zip Neck Top
$39
Baffin Base Layer Bottom Base Layer Bottom
$55
Baffin Base Layer Top Base Layer Top
$55
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