Well why stay fixed in the past when you can have the modern day equivalent of the Inuit sealskin?...
Pertex/Pile System
Buffalo are the originators of the Pertex/Pile system. To understand how the system works is to realise it's simplicity.
Pertex® is a densely woven fabric with high capillary action. When combined with any of the five Buffalo developed pile linings, a garment is produced which is windproof, warm, lightweight and resists rain. It is also highly breathable and extremely efficient at transmitting moisture vapour.
The correct sizing and a knowledge of how the ventilation zips are used, ensures the user gets the best from the garment. The simplicity determines there is little to go wrong, no pores to clog up or laminates to wear off. Where possible, we have avoided patches, needless pockets with unnecessary zips, or fancy trims all of which detract from the performance.
British made, Buffalo Systems outdoor performance pile and pertex clothing and sleeping bags for mountaineering, hill walking, climbing, ice climbing, mountain biking, cycling and general outdoor pursuits
Buffalo Systems Performance Outdoor Clothing - Parka - At home on ice covered decks in the Southern Ocean with round-the-world yachtsmen
Compared to DP Pertex, goretex [TM] is as breathable as polythene sheet!!!