amazing warmth and breathability. These are somewhere between and baselayer and a fleece midlayer. They are toasty and super breathable. If you have homeschool outerwear or do a lot of touring the homeschool baselayer and midlayer stuff works better than anything i've ever used. Homeschool is by far the most breathable snowboard stuff I've ever used. I highly recommend it so you don't get wet from the inside out.