Ushanka is the only type of hats which protects me from -30 and below. Some countries like Canada and even Germany also admit its effectiveness.

You are lucky to have such temperatures. Last time it was -30 in Poland was years ago. Now temperatures sit at around 0, few degrees under or few degrees over even. My uszatka is sitting and colelcting dust. I wore it last few days ago and I had to take it off from heat.