We’ve long considered the Specialized Prevail to be one of the best all-around road helmets on the market, so when we finally got our hands on the lighter and more breathable S-Works Prevail II Vent, we knew we had a winner. By removing a total of seven foam bridges from the center and sides of the helmet, the Prevail II Vent is able to move fresh air across the rider’s head 18% faster than the previous model. This is a welcome feature for climbers, sprinters, those of us living in warm climates, and those of us who run hot no matter the ride.