Bringing your whole head in from the cold on a ride can be as easy as slipping on the Pearl Izumi Barrier Balaclava. A P. R. O. Barrier panel over the forehead and ears prevents brainfreeze of a different sort by insulating against windchill, and it works in conjunction with P. R. O. Thermal to wick moisture and keep your noggin dry. The whole piece follows a slim fit, so it gives you room to breathe without taking up too much space underneath your brain bucket.