Details The Octal Mips from POC features a distinctive design based around fewer, larger vents which provide optimal ventilation and comfort on the longest and hottest cycling tours. Updated to include Mips, the Octal road cycling helmet is optimized to perfectly balance protection and performance. The helmet's EPS liner is thicker in the zones where most impacts occur, giving every rider enhanced protection where it is most needed. Construction Mips The Mips Brain Protection System enhances rotational impact protection. A lightweight EPS liner gives optimized protection. Fully wrapped unibody shell: The fully wrapped unibody shell acts as a monocoque for structural stability. Fit Lightweight size adjustment system The size adjuster spans the circumference of the head for a secure, comfortable fit. Ventilation Generously ventilated The instantly recognizable ventilation design is optimized for airflow at any speed. Details Molded Straps The helmet straps are molded into the liner for extra strength. An eye garage in the front ventilation ports gives secure storage for sunglasses while riding. Helmet Size S = 50-56cm / 19.7-22" M = 54-59cm / 21.3-23.2" L = 56-61 / 22-24" Weight N/A POC Octal MIPS Bike Helmet