Base Layer Bottoms

The best base layer bottoms, reviewed and curated by the Trailspace community. The latest review was added on April 20, 2019. Stores' prices and availability are updated daily.

Recent Base Layer Bottom Reviews

Omni-Wool Men's Midweight Pant

rated 4 of 5 stars These were comfortable. They wash well. The size was correct. I would recommend these for anyone that requires a stable undergarment. These were very comfortable. They did not hike up the leg or slide down from the waist. As a police officer out in the cold these kept me warm from the elements and with the dependability that they will stay in place. They have washed well and kept their shape through multiple washings. They seem well made and durable. I do not live in so cold a region to evaluate… Full review

Patagonia Men's Capilene Air Bottoms

rated 4.5 of 5 stars The Patagonia Capilene Air Bottoms are Patagonia’s newest base layer design which utilizes a unique seamless knit construction that is composed of 51 percent merino wool and 49 percent Capilene recycled polyester. This results in a very stretchy insulation layer that is both light and warm. The knit construction provides a nice thickness that works extremely well inside of waders for long days fishing in cold streams. Overall this is a great base layer, especially for colder conditions. Overview… Full review

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 Men's 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

user rating: 5 of 5 (2)
Patagonia R1 Pants
user rating: 5 of 5 (1)
Fjallraven Bergtagen Longjohns
$84 - $104
user rating: 5 of 5 (1)
Patagonia Capilene Thermal Weight Bottoms
$62 - $89
user rating: 5 of 5 (1)
Smartwool NTS Mid 250 Bottom
user rating: 5 of 5 (1)
Patagonia Capilene 3 Midweight Bottoms
$25 - $59
user rating: 4.5 of 5 (1)
Patagonia Capilene Air Bottoms
user rating: 4.5 of 5 (1)
Patagonia Capilene Lightweight Bottoms
$24 - $49
user rating: 4 of 5 (2)
Smartwool Midweight Bottom
user rating: 4 of 5 (1)
Terramar Thermolator II Pant
$15 - $17
user rating: 2 of 5 (1)
Terramar Silk Pant
Terramar Thermawool Pant
Montane Primino 140 Long Janes
$49 - $70
Patagonia Capilene Thermal Weight Boot-Length Bottoms
$59 - $85
Terramar Filament Silk Pant
Hot Chillys Micro-Elite Chamois Bottom
$51 - $54
REI Lightweight Base Layer Bottoms
Icebreaker Vertex Leggings
Icebreaker Oasis Legless
Craft Pro Dri Long Underpant
Columbia Baselayer Midweight Tight
Mountain Equipment Eclipse Tour Pant
Helly Hansen HH Lifa Light Pant
$23 - $40
Rab Merino+ 160 Pant
REI Mesh MTS Briefs
Polarmax Maxride Pants
$10 - $11
Columbia Arctic Trek Tight
Arc'teryx Phase AR Bottom
$56 - $79
Smartwool Midweight Boot Top Bottom
$60 - $90
Columbia Heavyweight II Baselayer Tight
$49 - $64
REI Midweight Long Underwear Bottoms
Marmot Harrier Tight
$40 - $50
Tasc Performance Bamboo-Merino Base Layer Level B Pant
Smartwool NTS Lightweight 195 Bottom
Outdoor Research Alpine Onset Bottoms
$50 - $65
Burton Expedition Pant
Mammut Go Dry Pants Long
Icebreaker Oasis Leggings
$37 - $95
Arc'teryx Rho LT Bottom
Arc'teryx Phase SL Bottom
Helly Hansen Active Flow Pant
Minus33 Kancamangus Merino Midweight Bottom
Polarmax 4-Way Stretch Tight
Arc'teryx Rho AR Boot Cut
Arc'teryx Rho AR Bottom
$100 - $125
Houdini Drop Knee Power Tight
$50 - $85
Marmot Silkweight Bottom
$48 - $51
Arc'teryx Satoro AR Bottom
$75 - $109
REI Silk Bottoms
REI Silk Long Underwear Bottom
REI Merino Wool Tights
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