I am from Quebec in Canada and the weather is cold in winter. I did a snowmobile test with a temperature of-24 degrees Celsius. I wore a wool sweater, heated jacket and a snowmobile winter jacket. I opened the jacket at high and I felt a nice heat in my back, heat that allowed me to stay warm for several hours. I ordered another jacket for a friend who will use it in snowmobile and motorcycle in the summer. We need to use it with a small cell block that can also charge a cell phone. I recommend it. The delivery time is long however but I think it's out of your control.
The waistcoat came in 19 days. packed in a handy pouch with a clasp. at a height of 170 weight 90 size XXL in butt. warms in the neck and middle of the back. shiny fabric on the inside of the jacket is likely to crumble. I had this with a heated jacket.