2 ways to wear them ,
long sleeved shirt , then heated jacket , fleece , jacket = this keeps you warm
l/s shirt , fleece, heated jacket , jacket = keeps cold out .
as ever , layers to trap air , and insulate you .
1st heated gear i had was Widder , no controller , worn over fleece ,against jacket , thought , hmm... not impressed , stopped for a fag , a sheet of ice fell off the front of my jacket. Widder was keeping cold out , not heating me.
Feck me, that’s serious.
I’ve ridden in -5% with a long sleeve base layer, keis heated jacket and my Kilm traverse jacket and on full it was too hot!