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LS Nuyarn Merino Crew



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The crew for you.

We’re pretty into our NuYarn® merino wool. As fibers go, merino wool is a natural wonder, an efficient insulator that also wicks and breathes; our NuYarn® merino features a yarn-spinning technology that elevates the comfort, performance, and durability of regular merino wool. For an outdoor textile, you can’t get much better. The quick and efficient warmth, quick-drying wicking-ability, and stretch comfort will tangibly improve your experience in the outdoors. Outdoor utility aside, the smooth, cashmere-like hand of our 125g NuYarn® merino wool simply feels incredible. So in designing the LS Crew, we didn’t have to do much. It’s an everday fit with generous length that lets the beauty and function of NuYarn® speak for itself.

Merino Wool Technology

Well known as insulation for cold-weather adventures, wool’s best-kept secret is how its natural wicking and thermoregulating characteristics allow for versatile, 4-season comfort. Our NuYarn® Merino Wool has a smooth, silky surface, and is the quickest drying and toughest merino wool around. Own less, play more.

125 Superfine
NuYarn® Merino

The 125 Superfine NuYarn® Merino is the lightest merino fabric in our fall collection.

  • 17.5 micron fine merino fibers
  • 85% merino wool / 15% nylon
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Customer Reviews

Based on 3 reviews
Consulting Forester

This shirt is perfect, especially in in the southern climes. Very lightweight, soft and comfortable - I probably were it around the house most, but makes a very good base layer during those cold snaps. I’m 6’ tall and 155 pounds and medium size fits true - not tight, not loose. I agree with another review that it “stays fresh” for several wears before needing washed. Actually, wool should not be washed as often as other fabrics. As I said initially, this shirt is perfect as they come and somewhat hefty price is well worth it. I just wish it wasn’t sold out/unavailable right before Christmas!

Solid product, no complaints!

Just got this shirt a few weeks ago and I can't take it off. It's super comfy, light weight, and form fitting (6' 185 lbs. wearing Medium). It works for casually cruising around town, hiking, or just lounging around the house. Another well done product from Trew. My closet will have more thumbs up logos to come..


I got the TREW LS NuYarn Merino Crew in Captains Blue, XL. I have to buy XL because I'm 6'4" with long arms, and I was really happy with the slimmer fit and long arm length. When I say slim.... I mean not boxy. It's definitely not tight, which is great for just wearing around town. This merino performs great, doesn't itch at all, and I've put it through multiple stink-test days and the shirt just refuses to get funky. Performance is really nice, as I wear it on the river under a light button-up or hoodie and adds an extra layer of warmth. On it's own, it keeps you warm... yet doesn't get hot if the weather heats up. Miracle? Not sure, but highly recommend.