My leather summer jacket is now about 35 years old, it is perfect for the Morgan.
For colder weather I must admit to wearing modern "technical" fabrics, but the lightweight Irvin Sheepskin is terribly attractive. But at £620 it isn't exactly cheap..
This is the link....
Irvin Made in a building on Thruxton Airfield, next to Motalita. I need to pay them a visit..