The MEC T3 Hoodie is a terrific base layer that is impressively warm considering its minimal weight (7oz / 205gr). It is very similar to Patagonia Capilene Thermal weight but about half the price with better features (Canadian $ is weak so you get more for your money even after $15 for USA shipping)
I really like the fitted hood as I can wear it under my ski helmet on cold days (rather than bringing a balaclava). I also appreciate the extra long zipper (just above belly button) as it aides in ventilation. The thumb holes are more robust than on most shirts and with the extra long sleeve length it definitely helps to keep your hands warm. I haven’t had an opportunity to really test out the wicking/breathability of the shirt but the waffle knit helps to promote airflow.