Alpinestars Supertech M10 Deegan HelmetRide like a true champion with theAlpinestars Supertech M10 Deegan Helmet.Alpinestars approach to the creation of the advanced technology in the Supertech M10 draws on its depth of experience from over half a decade of world class innovation across the spectrum of motorsports and especially, its deep rooted commitment to motocross. As with all other categories of technology that Alpinestars has mastered, bringing a new, highly complex, product to fruition requires specialist experience and know-how and a project plan led by the best brains in protection development.Features: Carbon shell construction utilizes a highly advanced molding technology with a multi-composite combination Three layer composite combination Unique, patented, visor release system Patented A-Head fitting height and angle adjustment system Collarbone protection Equipped with Mips® safety system How does the Mips® safety system work? The brain is typically more sensitive to rotational motion than linear motion because it has shear properties similar to water or gel. When different parts of the brain move relative to each other because of rotational motion, the tissues can stretch, which can cause concussions or other brain injuries. Rotational motion is a common cause of concussions and more severe brain injury in oblique hits to the head. The Mips® safety system consists of a low friction layer mounted inside the helmet. In a crash, the low friction layer is designed to move slightly inside the helmet to help redirect forces away from the head. This is intended to help reduce the risk of brain injury. Hydration system compatibility Included: spare visor, helmet bag Adult Medium:2.7lbs ECE / DOT certification