The K2 Phase Pro of K2 is the heavy-duty shield against hard-hitters. The helmet combines comfort, fit and protection like no other. The sturdy hard shell construction protects your head even in on hard crashes, the K2Dialed™ Fit System provides a fit like a glove and thanks to the pre-installed Baseline Audio System you always have the right sound. Construction A hard-shell construction made of a solid ABS shell and EPS foam inside offer protection even with a hard crash. Ventilation The Passive-Channel Ventilation gives you a perfect air circulation Fit System Active Matrix Venting allows you to regulate the airflow of the helmet vent system with the push of a finger. Certification ASTM F2040 / EN1077: 2007 (Class B) FeaturesConstruction - Hard-ShellLiner - Full WrapFit System - K2Dialed™Ventilation System - Active MatrixWeight - 490gBaseline Audio System