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#6 on this list
Ullfrotté Original 400
Woolpower
Swedish terry-loop wool worn by arctic militaries. Loft that survives repeated washing.
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#7 on this list
Super Thermo Mesh
Brynje
The Norwegian mesh string layer — bizarre-looking, unmatched moisture handling in deep cold.
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Specs side by side
| Spec | Ullfrotté Original 400 | Super Thermo Mesh |
|---|---|---|
| Maker | Woolpower | Brynje |
| Material | Ullfrotté Original (Merino Wool/Polyamide) | Polypropylene Mesh |
| Weight Class | Mid-Heavyweight (400 g/m²) | Lightweight / Midweight Layering |
| Construction | Terry-loop knit | Open Mesh Knit |
| Origin | Sweden | — |
| Best For | Extreme cold, low activity | Deep Cold, High Output |
| Model | — | Super Thermo Mesh |
What our reviewers liked and didn't
Ullfrotté Original 400
- Exceptional warmth in extreme cold
- Highly durable, resists wear and tear
- Terry-loop knit traps air effectively
- Maintains insulating loft after washing
- Wicks moisture surprisingly well for its thickness
- Retains warmth even when damp
- Bulky and less packable than lighter alternatives
- Can be too warm for high-output activities or milder conditions
- Higher price point compared to standard base layers
Super Thermo Mesh
- Unmatched moisture wicking in high-exertion, cold environments
- Creates excellent insulating air pocket when layered properly
- Exceptional warmth-to-weight ratio for its category
- Quick-drying properties prevent chilling
- Surprsiingly durable for its open-knit construction
- Unconventional appearance, not suitable as a standalone layer
- Requires proper layering to maximize insulation benefits
- Polypropylene can retain odors if not washed promptly
- Not ideal for casual wear or low-output activities
- Can feel slightly abrasive to some sensitive skin types
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