Women's Firn Line Long Sleeve Merino Wool

Color: Charcoal Grey
Size: XS
Fit: Azalea Fit
Sale price$99.00


  • Merino wool for soft, breathable natural odor resistance
  • Fit options for different body proportions
  • Great for nordic skiing, downhill skiing, winter hikes, snowshoeing, fat tire biking and running
  • Made in Anchorage, Alaska

The Firn Line Long Sleeve is the perfect, cozy, winter-weight base layer. Made of super soft 100% merino wool, the Firn Line is your winter companion for sweaty backcountry skiing ascents to cool evenings getting the fire going in the cabin. Take it on your winter travels and layer it under your favorite sweater.


Our 100% Merino wool is lightweight and breathable, but soft and warm enough to keep you cozy from the early chills of fall through the frigid temps of winter. Merino wool is naturally odor-resistant and a great natural fiber option. Our wool is ethically produced from non-mulesed merino wool sheep.


We offer fit options! Wild Iris for a more straight/square frame shape. Azalea for a curvier shape. Refer to Your Alpine Fit for more info.

Alpine Fit Body Shape Sizes


100% Merino Wool

Weight: 5 oz (size M)

This product is an official Made in Alaska product, manufactured at our workshop here in Anchorage!

The teal thread pairs with our Glacial Teal Women's Backcountry Base Layer Bottoms

Customer Reviews
5.0 Based on 5 Reviews
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United States United States
Warm and stylish

Recently did a trip in the Brooks Range where the weather and temps varied. I wore this shirt during rain, sun, and bugs and it did not let me down! It kept me warm and comfortable in a (sometimes) clammy dry suit. One of the essentials I will bring on all hiking, skiing, or pack rafting trips. Super high quality!

Lisa F.
United States United States
Best long john shirt

I love love love it!

Smell free

I thoroughly tested this shirt working in a remote field camp spawning salmon. I went 7 days of working and sweating, with no washing besides my face and hands and THIS SHIRT DID NOT STINK. It's my first merino wool shirt, and I'd heard how good this material was, but this was straight wizardry. This shirt fits SUPER well, I got the Azalea cut and it provides the perfect amount of room for my hips while hugging tight enough to not wrinkle under any of my other layers. I wear it pretty much every time I leave my house in the winter, and I expect to be wearing it a lot in my continued field time!

Great base layer

recreating in the interior of Alaska means great fluctuations in temperature. I wear this shirt all the time because it is perfectly breathable and fits so well- I don't feel it bunching or pulling in the wrong places. Also it's flattering, which is a great bonus!

Mary A.

My favorite of all the items I've bought. The cut and trim is very flattering, and it's perfect for layering as well. Soft, warm and comfortable. Wore it throughout Juneau's rainy summer.