This morning was my first commute in the 30's (36F/2C). My new Pearl Izumi AmFib's kept me toasty warm. I was a little on the warm side, so they can deal with a lot colder than this. I did discover I need new gloves, though. My warmest gloves have a tear in them. This is something I'd rather discover when it's 36F, not 6F (-14C)/