Smith Hardline Carbon MIPS Full Face HelmetSmith Hardline Carbon MIPS Full Face Helmet Three, two, one. Dropping. The Smith Hardline Carbon Downhill Helmet is feature packed and designed for taking on the rowdiest lines on the planet. The fully constructed carbon weave shell includes complete KOROYD coverage and is equipped with a Mips Safety System for maximum impact protection. Built into the bottom of the helmet is a Smith designed collarbone impact protection zone to help mitigate the risk