With the most airflow of all the Bern helmets so far, The Allston is specifically designed with the bike rider in mind. Flip Visor technology, 16 vents, starting at a weight of 13oz. Still all-season-compatible w option of Bern's trademark snap-in winter liners. $89. Assuming named Allston after the Allston-Brighton section of greater Boston (Bern is headquartered in Massachusetts).