Super Thermo Mesh

Scandinavian polar explorers and mountaineers have relied on open-weave synthetic mesh for decades, and the Brynje Super Thermo Mesh represents the definitive benchmark of that concept. While the open fishnet look can be polarizing, this base layer is engineered strictly for high-output movement in sub-freezing conditions. Anyone who chronically wets out traditional solid-knit polyester or merino wool thermals on steep winter ascents will find that mesh solves the moisture-management dilemma in ways conventional fabrics cannot.

The construction relies on 100% polypropylene Meraklon yarn knit into wide, open-cell netting. Polypropylene retains virtually zero water, ensuring that liquid sweat is pushed off the skin immediately and vented into outward layers. When paired with a windproof shell or midlayer, the open mesh voids trap thick pockets of dead air, generating surprising thermal efficiency without dead weight. During stop-and-go efforts like ski mountaineering or heavy-pack snowshoeing, it prevents post-exertion chill because the textile directly contacting your skin never remains saturated.

The trade-offs are strictly functional. Standalone wind resistance is non-existent, meaning this garment cannot be used without an external barrier in freezing air. Polypropylene also holds onto persistent body odor far more aggressively than natural wool, requiring regular washing on multi-day expeditions. Compared to standard merino offerings from brands like Smartwool or Icebreaker, Brynje's mesh provides drastically superior moisture transport and dry times, serving as an unapologetic, function-first layer for severe mountain environments.