Ian noticed the professor go to close the door. He was ready to start the class. Sitting for too long in this chilly environment wasn't too much fun. He raised his hand to offer and answer for the question. Professor, I've just used something I got from me mum. It's not terribly magical. It is handwarmers you can purchase from a outdoors store. You just break a package and get some warmth for a few hours or so. I hadn't even thought to use magic.