In the 1970s and 80s we used to tour with breeches, polycotton shirts, woolly pullover and greenspot-style jacket. In addition cheap plastic capes and sou'westers for rain.
The breeches were of fairly light-weight wool and terylene mix which was hard-wearing, quick-drying, machine-washable and even permanent press! For my husband I cut down a pair of bought trousers and made my own out of some gents suiting fabric. They were very practical as you could adjust the ventilation with the knee-straps.
These days I like the stretchiness of lycra but feel a bit of an idiot in it. I'm moving towards Craghoppers for shorts and trousers, and put up with lycra tops for the sake of the very handy rear pockets. Alas they don't look as smart as the tailored shirts.
I still take a cape for particularly torrential rain but have retired the sou'wester...