In reply to David Cowley:
I have been using a Montane Alpine Stretch. I would highly recommend it, it's highly versatile, cut very nicely, lots of stretch, feels tough and has stood up to scratching around on granite without a mark, also very cheap compared to comparable softshells.
I found it to be perfect for moving fast in the Alps in summer worn over a thin baselayer and layered with a nano puff on belays or in the shade.
In Scotland I have used it as a go to jacket for everything including mountain biking, some running, and winter climbing layered over a baselayer and r1 hoody.
I would definitely recommend an unlined softshell such as this or an Exodus (which feels a bit tougher but probably heavier and maybe warmer (which isn't necessarily a good thing if you run hot and plan on layering)).