Thank you for the follow-up regarding your draught-free improvements.
As you would expect to hear from an Aussie (or Kiwi!), look for sheepskin ugg boots (not just the ones cheekily trademarked by Deckers!) and sheepskin seat covers.

The seat covers may be worth a look as they are both soft and absorbent of sweat, and can keep up some kind of barrier to cold draughts.

Taxi drivers, couriers and Mercedes owners seem to inevitably use sheepskin (aka lambs wool) seat covers in my city.
Do euro w/chair manufacturers offer heated seats for certain mobility devices now, as they have in cars for years?
Saab cars have had heated seats for a LONG time.