F13 Vents Compliance: CPSC Bicycle Integrated MIPS (Multi-Directional Impact Protection System) - MIPS Is Designed To Reduce Rotational Forces That Can Result From Certain Impacts. By Integrating The MIPS Slip Plane Into The Retention System, We Are Able To Reduce Complexity And Weight For A Compact, Better Ventilated Helmet That Fits More Closely To The Head. Fusion In-Mold Polycarbonate Shell - A Process Pioneered By Bell Bonds The Helmet's Outer Shell To The EPS Foam Liner To Create A Sturdier Helmet. Integrated Visor Ergo Fit - Sleek, Easy-To-Use Dial System For One-Handed Adjustments (Integrated With MIPS Layer) No-Twist Tri-Glides: Quick-Adjust Fateners That Help Keep Straps Flat And Properly Positioned Sweat Guide Pad Design Pulls Moisture Away From The Brow Pad And Away From Eyewear Weight: 365 Grams (Size UA)