If Sean Pettit rides with it, it’s probably cool enough for you, too. Stay smart and stay safe with the low-profile, lightweight, and well-ventilated K2 Phase Pro Audio Helmet. The adjustable K2Dialed Fit System allows you to find the perfect fit with a quick turn of a dial. The Phase Pro comes equipped with the K2’s level 3 Baseline Audio that allows you to stay connected to your phone and music.