A lightweight design the Giro Jackson Helmet delivers Giro’s renowned protection and performance while not skimping on design and style. The modern profile of the new Jackson Helmet is created through the new Passive Aggressive Venting system, a design inspired by the aerodynamic airflow lines of high-end auto design. The discrete, yet powerful system effectively manages airflow and temperature while in-motion riding, hiking or when standing still. With MIPS technology, a lightweight in-mould construction and the dialled in fit of the In-Form™ 2 Fit system the Giro Jackson Helmet allowing you to confidently focus on the terrain ahead.Giro Jackson MIPS Helmet Features:   In-Mould Construction MIPS Equipped In-Form™ 2 Fit System On-The-Fly Vertical Tuning Passive Aggressive Venting System TPU Injected Brim Removable Goggle Retainer Removable Earpads Compatible with Giro Audio Systems Seamless Compatibility with all Giro Goggles CE EN1077 Certification S 52cm – 55.5cm, M 55.5cm – 59cm, L 59cm – 62.5cm