The 661 Crest Mips MTB Helmet is a tech-packed, modern trail helmet featuring MIPS at a wallet pleasing price point.MIPS Technology works to reduce the 'rotational violence' transmitted to the rider's brain during an angular impact, by using a Low-Density Liner (LDL) between the EPS foam and liner pads.661 Crest Mips MTB Helmet FeaturesMIPS (Multi-directional Impact Protection System).Light and well-ventilated design through in-moulded construction with 15 vents.Secure and micro-adjustable with a precise Dial-Fit System.Additional protection through extended rear shell coverage.Multi-Position Adjustable Visor.Removable Comfort Liner. More info