The use of this machine is simple.

This house has good insulation, so it's warm even in winter.

This house is built with materials that have high insulation.

This protective suit is for protecting oneself from radiation.

This house uses insulation to protect against the cold of winter.

My house is near the mountains.

I like to ski in winter.

It's very cold today, isn't it?

On cold days, warm coffee is the best.

On a cold winter night, hot cocoa is the best.