Smith debuts in the world of ultra-light full-face helmets with the all-new Mainline MIPS. Featuring ample ventilation and lightweight , but with a durable construction, this helmet creates the feeling of an airy half-shell while providing certified downhill coverage increasing confidence on noisy trails. Advanced protective features include Smith's unique Koroyd crush zones , which exceed all capabilities for dispersing impact force and a MIPS protective layer that helps cushion harmful oblique impacts.