As the saying goes, cooler heads will prevail – make sure you've done everything you can to ensure that with the new TACKS 720 helmet. It is equipped with the groundbreaking AER-TEC thermoregulation system, which ensures that air circulation and sweat evaporation are optimized. Lightweight and breathable, it also provides premium protection and protects both your head and lettuce.AER-TEC thermoregulation system with Nest Tech + I.Q.Shion DriThe innovative AER-TEC ventilation system with Nest Tech and ducts allows for maximum airflow and keeps your head cool and comfortable. New & Improved I.Q. Shion Dry Doesn't Trap Extra Sweat on Your ForeheadNest Tech + D30®+ Multi-Density FoamPremium Protection from a Combination of 3D-Printed Nest Tech in Key Areas, as well as Speed-Sensitive D30® Smart Material and High-Quality Foams to Distribute Impact EnergyNest Tech Liner + Multi-Density FoamsProvides ultimate comfort and fit as it adapts to the shape of your head like no other liner ever AdjustsActive stabilizer and tool-free adjustment systemSelf-adjusting backrest and easy front-to-back side adjustment provide a customized, comfortable fit that stays in placeOptimized aesthetics and reinforced side impact frameA pro-tested look with structural stiffness for added protection on the sidesTrust the TACKS 720 hockey helmet to keep your head cool and in the game. With the AER-TEC thermoregulation, it guarantees optimal air circulation.S= 51cm - 56cmM= 55cm - 58.5cmL= 58cm - 62cm