Mavic sequence xc pro helmetmavics sequence xc pro protects you while keeping you comfortable and your temperature regulated even on the trickiest of terrains the helmet has an ergonomic shape with additional protection at the back of your head and features mavics patented live fit sl technology a flexible xrd foam construction that moulds to your head shape for a perfect personal fit another feature is their ergo hold sl retention system which lets you adjust the tightness with just one h