The Seyen MIPS is a "clean sheet of paper" design that incorporates the Roc Loc 5 Air adjustable fit system into the MIPS liner. The result is a lighter, better-fitting helmet compared to previous designs. The 25 Wind Tunnel vents found throughout the Seyen MIPS keeps the wearer cool and comfortable on sweltering days. The larger "smokestack" vents at the top of the helmet assist in releasing heat during hard efforts at a slow pace, especially during steep climbs. A Multidirectional Impact Protection System -or MIPS- system allows the Giro Seyen MIPS to better absorb the energy of an oblique impact.
The MIPS liner does not extend the lifespan of any helmet beyond the initial crash. If your helmet is damaged in an accident, replace it.