Featuring 360Turbine Technology, the helmet is lined with turbines which are 360moving discs constructed from an energy-absorbing shape and material, this tech has two exclusive advantages, namely the reduction of rotational acceleration to the head and brain and the absorption of energy upon impact at concussion level.This helmet comes with a premium liner for long lasting comfort and moisture wicking properties. The vents are also covered with a stainless steel mesh. This offers more protection from stones, dirt or bad weather.Get supreme full face head and brain protection at an amazing price.Key Features:Downhill certified ASTM polymer shell in three sizesStainless steel mesh vents360° Turbine TechnologyReduced peak brain acceleration by up to 30% at impact speeds associated with concussionReduces peak brain rotational acceleration by up to 40% breakaway visor function for additional rotational impact force reductionHigh quality inner liner for all comfort in hot and cool weat