How do you keep warm if you're a cold person?

[HalyardHitch]

Just looking for little tips regarding my son. He has some medical issues which means he struggles to maintain his body temperature and is often cold. We were out on Saturday in t-shirts and he was in a jumper complaining of the cold.

We always put a vest on him but short of putting him in a coat 24/7, I'm stumped.

Anyone have any tips I may have overlooked?

My socks and yeti type slippers are a family joke, they only come off when the summer arrives, well why not men wear socks all the year round. I have gloves in a drawer in the hall, gloves in my handbag, gloves in the car. Scarves, warm coats. Then I go to bed and glow like a radiator on and off all night gggrrr...