Not good. Warm and uncomfortable, they dont breathe and they are itchy also they wrap your whole lower leg. Based on my experience of owning the older versions, I hated them. If it’s just for xc, get some light knee/ shin pads.

Something like this shape.

I prefer knee pads myself, troy lee T- bones come pretty far down the shin and imo cover the part of the shin most regularly hit with the pedals.

If you’re determined to get them – Im 5’9 but have very chunky legs. Medium was a perfect if slightly tight fit.

I got large for the length as opposed to the diameter – they seem to come up quite short.

they are warm but they work well and at this time of year the warmth is quite welcome.