Hi.
The last time I hit cold I noticed the foot well and transmission tunnel was plenty warm, as normal, but there is no way a heater blower could warm the open air. I would recommend gloves and a helmet or some head wrap and an insulated coat.
I also remember the beating the top of my head was taking from the buffeting. I started wearing a welders bandana to keep what's left of my hair in place.
This is open cockpit flying, on the road.