Here in America, the word "Thermal" attached to clothing usually makes you picture merino wool, thick-knit cotton or the classic USGI henley. But commonly in Europe & other countries across the pond, there's an alternative that may seem totally backwards at first. 

The mesh insulative layer is a genius abuse of one of the most underrated insulating elements of all - Air. by generating air pockets between you and your outerwear, the mesh actually insulates you surprisingly well. The "air pocket" principle is used in many "puff" jackets on the market that allow small amounts of air through the jacket's inner and outer shell, but much more slowly. And unlike some materials that claim to be "breathable", the mesh allows much more air to pass through when you need to cool off. 

So what's the application? Any day that fluctuates in temperature quite a bit, where you'd want both insulation and decent breathability, the Mesh is perfectly suited for the job. 

If you're down to try the Freddie Mercury-esque solution to your insulation woes, this might just fit the bill.

Sizing

The swedes have one of the more unique sizing systems out there, please consult the sizing guide on this page for more information 

Specs

• Genuine Swedish Military Issue
• 55% Modacylic / 45% Cotton
• Mesh body fabric with inherent stretch properties
• Durable lay-flat seams for all-day comfort
• non-mesh chest panels for slightly unzipped jackets (and nipple protection)
• non-mesh shoulder panels for comfort under load
• Olive Drab Colorway