K2 Phase with MIPS. The K2 Phase Pro helmet for men offers a low profile, hard-shell design and clean style that provide safety and comfort.The comfort is enhanced with the combination of the Active Matrix Ventilation and the perfect fit of the K2dialed™ Fit System. It's compatible with the K2 Baseline Audio System (not included)MIPS® Multi-Directional Impact Protection SystemInside the Scout lies the MIPS® Brain Protection System (BPS). It deflects dangerous forces that would otherwise hit your brain with full force, especially in the case of impacts with high rotational speed.ACTIVE MATRIX VENTINGActive Matrix Venting allows you to regulate the airflow of the helmet vent system with the touch of your finger. Controlling large vents with minimal effort results in superior style and function that can be adjusted on the fly. Climate control with the flip of a switch. In addition, the MIPS® Brain Protection System provides better protection during impacts with high rotational speeds.