Wool for warmth

Woolly layers

Thank heavens for wool. The first snows have fallen on the ranges to the south of Sydney and we can feel it in the air, even here on the Central Coast. I am grateful for my winter woollies, mostly from the wool shop in Taihape, New Zealand.  

NZ Met Service website

In New Zealand they measure the cold by telling you the number of layers you will need to feel warm. The Met Service website shows the temperature is currently 11C in Wellington but feels like 8C. They recommend three layers plus a windproof layer..
 
Three layers for 8C! That might be adequate for those hardy Wellingtonians, but what about we folk whose blood has run thin after a long hot summer?  Our forecast temperature is 17C for tomorrow, but I am needing three layers even today when it has been warmer. I wonder what the NZ met service would recommend for the thin blooded?