Alpinestars Supertech M10 Flood HelmetThe goal of the Alpinestars Supertech family of helmets was to create the most advanced, protective, and performance-enhancing helmets possible for riders worldwide. With the S-M10, Alpinestars Helmet Development team engineered the helmet to offer the perfect blend of excellent ventilation, and unsurpassed comfort, to create a helmet with the lightest weight possible, all without compromising on any other front.The S-M10s design offers a smooth, attractive, aerodynamic profile which is streamlined and free of any external channels and features that might act as a load point in an impact or compromise the overall integrity of the helmets construction. The surface curvature promotes reduced friction on impact, allowing deflection and the most efficient transfer of energy to protect the riders head from direct force to the skull and referred to the neck and spinal column.Features: Lightweight outer shell constructed from carbon fiber Four shell sizes Multiple density inner liner 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. Unique, patented, visor release system 2 peaks included, one regular and one super high Patented A-Head fitting height and angle adjustment system Maximum ventilation with 19 intake and 5 exhaust ports Side shell shape coupled with soft EPP foam to prevent damage to collarbone in case of crash Removable, emergency release cheek pads with 3D contoured foam Removable anti-bacterial and hydrophobic comfort liner Hydration system compatibility E-Ject prepared Included: spare visor, helmet bag Adult Medium:2.7lbs DOT and ECE 22.06 ECE 22.06 is a helmet safety rating that extends and increases the testing requirements of ECE 22.05 (with 22.05 being a more modern, more comprehensive European alternative to DOT). With 22.06, 12 additional impact points are analyzed (now totaling 18) and impact speed is increased (from 7.5 to 8.2 m/s). Unlike DOT, every ECE helmet model must actually be tested by an independent lab before it receives 22.06 certification. approved