In that case I think the large will be too big for me.
I found this under sizing.
THE GARMENT IS FITTED, IF YOU WANT A RELAXED FIT, OR WISH IT TO GO OVER A WINTER JACKET, WE WOULD ADVISE TO SIZE UP, FROM NORMAL.
And under that there are some reports from folk detailing their actual size and what fitted.
Im 32″ waist and 38″ chest and the medium is a super fit over a short sleeve jersey’
“39.5 chest and 34 waist and large is on the button for me”
You could always go for a slightly more relaxed less racing snake fit. I find that more adaptable.
By the by, also found this curious guidance.
- Not designed to be packable, but Will roll up to fit in a large jersey pocket
Not sure what that means. I assume packing it will do no harm? Just means not designed to be packable by the demanding requirements of ultra minimalist roadies who aim to pack everything up their xxxxx?
Another question about it - does it have any sort of pocket (would have a zip closure i guess if it had) at the back? Often use such a thing in tops for temporarily putting bits in when getting off bike for a stop.