Unisex Super Thermo Long Sleeve Shirt Base Layer with Inlay

(2 customer reviews)


Superior warmth, moisture management and light weight. This ST shirt is made 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. The solid knit inlay on the shoulder provides a comfort layer under pack straps. This is also a great choice to be worn under a dry suit. Sizes: XXS – XXXL. Color: navy.

Technical specifications:

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


SKU: 10200305 Category: Tags: ,


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





2 reviews for Unisex Super Thermo Long Sleeve Shirt Base Layer with Inlay

  1. Tim Hewitt

    I have completed the 1000 mile Iditarod Trail Invitational winter human powered race across Alaska 10 times. I am the current record holder on foot and am the only known person to complete the trail on foot unsupported and unassisted. I am always changing out gear for better gear. A friend from Norway gave me long and short sleeve super thermo base layers and I used the long sleeve under a capilene mid layer on a 14 day solo snow shoe expedition through interior Alaska in deep snow in frigid temperatures this year. In fact I experienced the lowest temperature that I have encountered at 65 below zero F on the Tanana River in February. My Brynja worked perfectly and I was dry to the touch despite working so hard in deep snow. My outer down puffy was completely frozen to my primaloft vest and the feathers were frozen into clumps. But my body was dry. I just put in an order for lots of Brynja products. I can’t eliminate all risk but I can certainly eliminate some and that’s why I am fully endorsing this product!

  2. Wisenber

    I’ve had mine for about a year. Definitely seems to hold in more warmth than a regular merino or poly base layer.
    On one dayhike in the 40’s F with a thin hoodie as the outside layer going up and down steep grades, it kept me comfortable and dry. A normal top would have been soaked from the climbs and had me chilled while descending.
    Under a midweight wool sweater, I stay warmer using this layer rather than a Smartwool long sleeve top.
    Doesn’t appear to hold odor after several days of backpacking.
    When washing, the mesh dries quickly, but the raglan sleeves and neck hem will require longer without wringing them out first.
    I considered the merino wool version, but this one works well enough not to bother.
    I’m considering getting a short sleeved version to try during the summer; however, with the high humidity in my areas may not help.
    Great addition.

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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