20% Off 1 Full-Price Item. Code 20FULLPRICE. Exclusions Apply.
Home Page

Detail Images


Current Color

Backcountry Merino Baselayer Bottom - Men's

40% Off
sale from $59.97 $99.95

Select a Size:

Select options
  • Select options
    • S
    • M
    • L
    • XL
    • XXL

    Select a Color:

    Select options
  • Select options
    • Granite CamoPast season color
    • BlackPast season color

    Free Shipping on orders over $50*


    Spruces Merino Long Underwear

    Built from an innovative blend of wool and nylon, the Backcountry Spruces Merino Long Underwear brings thermal performance to all your snow-covered adventures. Nuyarn takes merino wool and wraps it around a nylon core, giving you a durable fabric with soft next-to-skin comfort—one that layers easily beneath your hardshell pants. In addition to its temperature regulating benefits, wool is also moisture-wicking and odor-eating, so you can work hard and play harder.

    • Backcountry Exclusive
    • Performance baselayer for backcountry pursuits
    • Innovative wool blend combines durability with comfort
    • Fabric offers moisture-wicking, odor fighting performance
    • Next-to-skin fit easily layers beneath your ski pants
    • Item #BCC00C8

    Tech Specs

    Nuyarn (90% merino wool, 10% nylon)
    Recommended Use
    all-mountain skiing, all-mountain snowboarding, backcountry skiing, backcountry snowboarding, snowshoe hiking, winter camping
    Manufacturer Warranty
    limited lifetime

    Tech Specs

    What do you think about this product?


    >Rating: 5

    Same Experience

    Familiarity:I've used it several times
    Fit:True to size

    I really like these, I typically run hot when snowboarding and doing anything active and this year I bought some pants that are basically just a shell, in the past I have always had some kind of insulation in my pants but I wanted pants that would offer more climate control with layering. These were my first base layer pants and I have to say I like them quite a bit. I will agree that the ankle cuff was not stretchy enough to pull past my calf but I really like them anyway and that wasn't a deal breaker, but I will agree with the other reviews on that. Otherwise, they are soft and just the right amount of warmth for all of my outings that have been in the 20-35 degree range with just an outer shell over these.

    >Rating: 4

    Good, but not great

    Familiarity:I've put it through the wringer

    I love the fit of these, but a few small tweaks would make these 100x better. The ankle hem is quite uncomfortable since it does not stretch, which does not allow you to pull the baselayer above your bootline. Also, the waistband of these would be so much better without the fabic cover that tends to just twist and bunch up after having them on for a few minutes. Other than that, I love these and will continue to keep wearing them.

    Hey Andrew, we have updated the ankle hem to stretch in next year's iteration! Thanks for your feedback.

    >Rating: 4

    Warm, but the fit is hard to get right.

    Familiarity:I've put it through the wringer
    Fit:True to size
    Size BoughtLarge
    Height6` 0"
    Weight210 lbs

    First off, let me say these are my first merino base layer bottom. I'm super happy with the feel and the warmth of them, but the fit is a little tough. I'm right between sizes so I sized up to the Large, but I think the Medium would have been a better fit the legs are a little more baggy than I would like. Also, the ankle hem doesn't stretch well, so it is a little uncomfortable to pull them up around your calve if you don't want them tucked into the boot.

    >Rating: 2

    poor stretch on ankle hem

    Familiarity:I've used it several times
    Fit:True to size
    Size Boughtmedium
    Height5` 11"
    Weight181 lbs

    The fabric seems very nice and soft. But the wrong stitch was used on the ankle hem so it has very little stretch and recovery. I compared the construction to a pair I have from Patagonia and there's a big difference. It just makes taking them on and off more difficult -- for that reason, I wouldn't recommend these.

    Hey Ed! Thank you for the honest feedback. We are revising this hem stitch for our next shipment of the pants. If you want to return them I'm happy to facilitate that and connect when the new inventory arrives.

    >Rating: 4

    Solid base layer

    Familiarity:I've used it several times
    Fit:Runs large
    Size BoughtM
    Height5` 9"
    Weight180 lbs

    I got these for my boyfriend as a new base layer for cold weather recreating (XC skiing, resort skiing, touring) and he absolutely loves them, They are very comfortable, soft, and wicks moisture away well however I would agree that the fit is a bit strange. He is a 33 waist with a 30" inseam and got a Medium - the waist is spot on but it runs pretty big from a length perspective. Also agree with the previous review regarding the cuff at the end of the pant, not much flexibility and can be easily ripped.

    >Rating: 4

    Pretty solid, slightly weird fit

    Familiarity:I've put it through the wringer
    Fit:Runs large
    Size BoughtS
    Height6` 0"
    Weight135 lbs

    Ive worn these quite few times touring and resort skiing, and they are pretty darn solid. Warm, medium-lightweight construction, and Backcountry brand. However, the fit is a bit large on me. I have pretty skinny legs so I went for the S, but the waist on the S was a little loose on me. It seems the S is tailored for shorter and stockier size S men. Another issue i had is with the pant leg construction. The little fabric ring that holds the pant's form around the end of the pant leg does not stretch much, and feels like it can be easily ripped. Seems like a manufacturing oversight. All in all, still a solid product.

    >Rating: 5

    Fit well

    Familiarity:I've used it once or twice and have initial impressions
    Fit:True to size
    Size BoughtMedium
    Height6` 0"
    Weight205 lbs

    I've not had a chance to really field test these yet but they feel great. They seem to breathe like merino should and the form fitting like the description says. I like that they are machine washable but can't comment about durability.

    Thank you for the first impression thoughts, Keep us posted on how they work out when you get some mileage on them.


    My question is how long is this spruces merino long. I’m only 5 ft 2 in. Will this be too long for me and what recommendations are there for shorter legs?

    Hey Antonio. The inseam is S is 30 ¼. I would recommend trying a small size if you are typically a small in other brands. I think that this style could be great for your height.


    Has the stitching on the ankle cuffs been updated on these base layer pants yet?

    Hey Christopher, we just learned this was an issue with the stitch and it will be updated in our next shipment. I do not have a date at this time.


    How many g/m^2 is the fabric?

    Hey John, great question! The fabric is 145 gsm.