Men’s Super Thermo Longs Base Layer with Fly & Inlay

(2 customer reviews)


Full length longs with reinforced knees, thigh and crotch with fly. The ST Men’s longs are made from 100% Polycolon® polypropylene which is the lightest and driest yarn available. Designed to withstand years of heavy use and abuse, the ST bottoms are perfect for extreme cold weather activities. Ideal for hunting and under waders or dry suits. Sizes: XXS – XXXXL. Color: navy.

Technical specifications:

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

SKU: 10200412 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 Men’s Super Thermo Longs Base Layer with Fly & Inlay

  1. K.Driver (verified owner)

    Very good quality, light and very soft. The fit is true to size.
    I’m 5’9 180lbs, 32 size jeans, 34 size dress pants, not fat, got a medium, and fits perfectly. The netting has some stretch.
    Obviously this works perfectly to evacuate sweat.

  2. Jared Suzuki (verified owner)

    Excellent quality! Light and very comfortable. A bit hard to decipher the sizing instructions but mine fit fine. Highly recommended

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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