SUPER VENTILATED FULL-FACE CARBON HEAD AND BRAIN PROTECTION This carbon MTB helmet utilizes M-Forge construction to boast standout ventilation lighter weight and premier comfort.This ASTM DH certified helmet is the go-to helmet for enduro and bike park riders. Uphill downhill upside down E-bike or trail - you name it the Gravity 6.0 has you covered. This M-Forge carbon shell is engineered to be less brittle and more flexible than traditional carbon. This prolongs the helmet life and most importantly increases head and brain protection. The full-face-only design offers outstanding ventilation and boasts a clever modular mouthpiece that’s removable to increase airflow. It is important to use a helmet that reduces both rotation and linear impact energy to your head and brain. All Leatt helmets feature 360 ̊ Turbine Technology. This design utilizes a network of small discs constructed of a non-Newtonian energy-absorbing material. Because these Turbines can move 360 ̊ omnidirectional this technology has two exclusive advantages: namely helps with the reduction of rotational acceleration to the head and brain and the absorption of energy upon impact at concussion level. So next time you crash see to it that you are protected by the best! Lightweight DH certified helmet M-Forge Carbon shell with composite chin bar  in two shell sizes Maximized ventilation with 22 vents Removable mouthpiece ventilation cover DD ring closure system 360° Turbine Technology Helps reduce peak brain acceleration by up to 30% at impact speeds associated with concussion Helps reduce peak brain rotational acceleration by up to 40% X-Static® moisture wicking breathable anti-odor and washable inner liner Visor-Extension semi-transparent gunsmoke color for bad weather conditions. Optimal neck brace compatibility Visor with breakaway function for rotational reduction in a crash In-molded EPS + EPO impact foam for superior energy absorption Weight: Estimated from 840g +/- 50g 1.85 lbs Certified and tested: AS/NZS 2063:2008 ASTM F1952–15 EN1078 CPSC 1203 Sizing#S 55-56cm – 21 5⁄8 - 22"#M 57-58cm – 22 ½ - 22 ¾"#L 59-60cm – 23 ¼ - 23 5⁄8"#XL 61-62cm – 24 – 24 ½"