Mavic ksyrium pro helmetmavics ksyrium pro is a helmet that delivers in every way especially when youre spending hour after hour in the saddle and you need a helmet to keep you safe cool and comfortable it comes with all round protection and a fantastic personal fit which is provided by mavics patented live fit technology an xrd foam construction that moulds to your head shape giving you an incredibly natural fit ksyrium pro is strengthened further by the ergo hold sl retention system whi