“Bought these to use now that the colder days are coming. I bought a size large I am 6,2” with a 40 chest and large fitted well. I have been out on a few rides of between 40-70 miles in under 10c with a decent wind blowing wearing this below a long sleeved jersey and was just right temp wise, not toasty but not cold. Seems to keep the cold off your core albeit my arms felt a bit cold initially.”