661 evo am patrol helmetthe evo am patrol helmet from 661 is the definitive am open face helmet featuring a built in boa micro adjustment system that allows the helmet to fit every head shape comfort and security661 focused on comfort and security when developing this helmet with the focus on being able to deliver a helmet that needs only adjusting once when starting your ride and then forgotten about remarkable comfort661s evo am patrol helmet is able to reach remarkable levels of comfort du