Ready to Race? Let's go! The Nirvana helmet is ready to rock with style and attitudeQuick removable and replaceable visor adds versatility and can be used if hitting the trails or riding the roads at duskRollsys is Lazer's very own award winning fit system: simply control the size and the comfort by turning the wheel on the top of the helmetThe Rollsys system permits an accurate and progressive peripheral sizing adjustmentThe fit of the helmet will be symmetrically tightened up without any pressure points on the head, with a simple one-handed adjustmentBy taking away the retention system at the back the Rollsys system is also the perfect solution for people with a ponytailA small light can also be purchased separately to add you your Rollsys to increase your visibilityRigidity Brace System is an in-moulded reinforcement structure to improve impact resistanceIn-mould (2-piece) construction21 cooling ventsWeight for a size medium 255 gSize: Medium 52-58 cm, Large 59-61 cm