The 360-degree ventilation provides superior airflow for all-day comfort while Mips -  technology reduces rotational forces transmitted to the brain during impact. The fully adjustable visor is goggle-compatible and features a removable Go - Pro mount. Sizes: XSmall   53-54cm Small    55-56cm Medium   57-58cm Large    59-60cm XLarge   61-62cm XXLarge 63-64cm Like all other riding styles, helmets are a must when it comes to downhill/gravity. When you're flying at break-neck speeds, dodging obstacles, trying to see what's ahead before it hits you and hoping your face only feels the wind, not the mud and dirt, you need a full face helmet to help protect your head. Our friendly team can help you choose a helmet that fits right and is fit for purpose whilst not blowing your budget.