Unisex Super Thermo Long Sleeve Shirt Base Layer

(7 customer reviews)


Extremely warm, dry and light. The ST shirt is perfect for the most severe environments and intense activities. The Polycolon® mesh provides 4 to 6 times the insulating value of solid knits while keeping moisture off the skin. The garment is used extensively by military and expedition forces where intense activity can cause sweat and moisture to put you at risk. This is a great choice for backcountry skiing, through hiking and hunting. Sizes: XS – XXL. Color: black.

Technical Specifications:

Material: 100% polypropylene
Weight: 130g
Material Weight: net 140 g / m2

SKU: 10200300 Category:


Brynje original Super Thermo (ST) mesh is made from 100% Schoeller® Polycolon® synthetic yarn, knitted into a 3/8″ open weave mesh that provides 4 to 6 times the insulating power of any solid knit by weight. The polypropylene yarn absorbs virtually no moisture while the mesh design allows perspiration to pass through the garment in vapor form. Nothing wet against the skin!

Polypropylene also has a very high strength to weight ratio providing super light garments designed to withstand years of extreme use. Brynje Super Thermo base layers have been used extensively in expedition work and are worn by Special Forces troops across the globe. Brynje ST garments are not just ideal for high intensity, cold weather activities. Because of the thermostatic qualities of the mesh, these base layer garments are exceptional for warm weather use as well. “Making the case for synthetic mesh base layers.”

Additional information




XS, S, M, L, XL, XXL

7 reviews for Unisex Super Thermo Long Sleeve Shirt Base Layer

  1. Peter Scott

    I recently returned from a seven day 1,180 mile journey around Ring Road in Iceland. The weather varied from a misty drizzly day of 45 F and a 13 Mph wind at Grimsey Island Artic Circle to a pleasant 70 F in Egilssadir. Yet, even at 70 F, there was still an occasional cool wind. While hiking to the Arctic Circle, I wore the Super Thermo mesh short sleeve shirt under the Buffalo Special 6 jacket. That was actually too warm. But, with a temperature of 55 F at Glacier Lagoon and a slight breeze, while walking about some trails, I wore the Long Sleeve Super Thermo shirt under a Buffalo wind shirt. I also wore the thermal under the foul weather gear provided for the Zodiac glacier boat tour. I was comfortable near the cooler climate of the glacier.
    While in Iceland, 90 percent of the time I wore only a thermal shirt and the wind shirt for comfort. In addition, throughout my trip, I also wore the Super Thermo Lined beanie. I was very happy with the comfort of these light easily packable products provided me during my exploration of Iceland.

  2. Jennifer Boyts (verified owner)

    This shirt absolutely exceeded my expectations! What a fantastic piece of gear! It is very soft and comfortable against your skin and very warm. I wore it for about 7 nights as a sleep shirt as I sleep very cold and it kept me very warm. Wore it around camp as well and it was equally impressive! I’m probably going to buy one in navy with the inlay for wearing with a pack. Excellent product, you won’t be disappointed.

  3. Scott

    I agree with Joseph. The neck logo doesn’t serve the shirt well. Other than that, great shirt.

  4. Rick (verified owner)

    Forgot! Great customer service from Jeff. Went way out of his way to get my back order to me. Much appreciated!

  5. Rick (verified owner)

    These work great! Much more comfortable on my winter bike rides. Quality construction and true to size.

  6. Joseph McCormick (verified owner)

    Great except for logo on neck

  7. Sarah Stabley (verified owner)

    I’m 5’3’ and 160 lbs female. I ordered a medium and it fit perfectly.
    I slept in these at 28* with a 10* down quilt and was snug as a bug.
    At 4.6oz for a medium I would highly recommend these for those wanting to cut oz and still be warm!

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Brynje Size Chart

Brynje Size Chart

Laundry Instructions

Wool is a natural fiber which does not to be laundered regularly. A global wardrobe survey in 2015 by AC Nielsen confirmed that wool garments have a longer life than cotton – as much as 50% longer. Merino wool can be worn multiple time between washings which will prolong the garment life and protect the environment. The synthetic fibers like Schoeller® Polycolon can be machine washed and hung to dry.

Hand wash or machine wash on gentle cycle with cool water (not to exceed 85°F).

Line dry. Do not tumble dry.

Do not use bleach.

Do not use fabric softener.

Do not dry clean.

Brynje USA