The Phase Pro is a lightweight, low profile helmet. It has the Active Matrix Ventilation system that with the flip of switch you can cool down or warm up. The Phase Pro comes with the Level 2 Baseline Audio System that as integrated headphones and volume control that you can hook to your music device, so you can rock out on the lifts, and tune out the gapers. The K2 Dialed Fit System will get the Phase Pro to fit perfectly on your dome. Depending on your style you can snap off the goggle strap without any tools. No wonder the Phase Pro is the helmet that K2 Pro Sean Pettit chooses to wear.