Base Layer Bottoms

The best base layer bottoms, reviewed and curated by the Trailspace community. The latest review was added on December 20, 2018. Stores' prices and availability are updated daily.

Recent Base Layer Bottom Reviews

Patagonia Men's Capilene Thermal Weight Bottoms

rated 5 of 5 stars These fleece bottoms are awesome!! I’ve had them for five years now and I wear them ice fishing and fat biking. I will definitely buy another pair if they ever wear out. These fleece bottoms hold up in the coldest temps. They are fleece so they are so comfortable as a base layer. Will definitely purchase another pair if these ever wear out. Full review

Avalanche Wear Mogul Pant

rated 0.5 of 5 stars Pants pilled (outside of fabric) like crazy after wearing one or two times. Didn't even wash yet. Pilling was on front and side of my thighs. Loved the fit but the pilling is intolerable! Would have purchased several of these; instead will be donating :( Would NOT recommend. Very disappointing! Full review

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

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

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

Avalanche Wear Mogul Pant

rated 1 of 5 stars These used to be my go-to pants. They were fantastic until they changed the fabric years ago and made them in China. I just bought these pants after years of refusing to buy them for years because of the terrible pilling and their latest product is worse than ever. They pilled immediately. I bought Athletica Polartec at the same time and there is no pilling. I am so disappointed because 15 years ago when they were made in Canada they were fantastic. Why don't companies listen to their consumer reviews? Full review

Coldpruf Platinum II Pant

rated 5 of 5 stars ColdPruf has better quality materials (not cotton) than the old stuff I have, and the fit is much better. There are excellent sizing charts and sizes for tall people, like myself. The fit is great. I could comfortably play sports or other activities in the Platinum II without any range of motion restrictions. It is tight enough fitting for a base layer (the modern name for long underwear), but not too tight. Recommend for active people in cold weather. As a member of another website, I get products… 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

user rating: 5 of 5 (2)
Patagonia R1 Pants
$119
user rating: 5 of 5 (1)
Fjallraven Bergtagen Longjohns
$140
user rating: 5 of 5 (1)
Patagonia Capilene Thermal Weight Bottoms
$67 - $89
user rating: 5 of 5 (1)
Smartwool NTS Mid 250 Bottom
$50 - $95
user rating: 5 of 5 (1)
Patagonia Capilene 3 Midweight Bottoms
$25 - $59
user rating: 4.5 of 5 (1)
Smartwool Microweight Bottom
$52
user rating: 4.5 of 5 (1)
Patagonia Capilene Lightweight Bottoms
$42 - $49
user rating: 4.5 of 5 (1)
Kenyon Power Stretch Baselayer Bottoms
$20
user rating: 4 of 5 (2)
Smartwool Midweight Bottom
$60 - $95
user rating: 4 of 5 (1)
Terramar Thermolator II Pant
$15 - $26
user rating: 2.5 of 5 (5)
Avalanche Wear Mogul Pant
$20
user rating: 2 of 5 (1)
Terramar Silk Pant
$26
Montane Primino 140 Long Janes
$90
Minus33 Tecumseh Midweight 3/4 Bottoms
$60
Patagonia Capilene Thermal Weight Boot-Length Bottoms
$85
Terramar Filament Silk Pant
$30
Helly Hansen LIFA Pant
$40
Hot Chillys Micro-Elite Chamois Bottom
$55 - $64
REI Lightweight Base Layer Bottoms
$35
Icebreaker Vertex Leggings
$110 - $130
Icebreaker Oasis Legless
$56 - $80
 
Craft Pro Dri Long Underpant
$30
L.L.Bean Cresta Wool Base Layer, Pants Lightweight
$59
Columbia Baselayer Midweight Tight
$22
Mountain Equipment Eclipse Tour Pant
$70
Patagonia Merino Midweight Bottoms
$49
Icebreaker Apex Leggings w/ Fly
$110
Patagonia Capilene Air Bottoms
$129
REI Mesh MTS Briefs
$19
Polarmax Maxride Pants
$11 - $12
Columbia Arctic Trek Tight
$54
Arc'teryx Phase AR Bottom
$75 - $90
Smartwool Midweight Boot Top Bottom
$71 - $90
Rab Nucleus Pants
$38
Columbia Heavyweight II Baselayer Tight
$48 - $65
REI Midweight Long Underwear Bottoms
$21 - $29
Voormi Thermal II 3/4 Bottom
$119
Marmot Harrier Tight
$30 - $49
Burton Midweight Shant
$45
Tasc Performance Bamboo-Merino Base Layer Level B Pant
$55
Under Armour Base 1.0 Legging
$45
Smartwool NTS Lightweight 195 Bottom
$45 - $60
Smartwool NTS Mid 250 Pattern Bottom
$50 - $99
Minus33 Katmai Merino Expedition Bottom
$100
SportHill Summit Tight
$97
Icebreaker Vertex Legless
$110
Marmot ThermalClime Pro Tight
$30
Mammut Go Dry Pants Long
$23 - $54
Icebreaker Oasis Leggings
$50 - $90
Arc'teryx Rho LT Bottom
$89
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