Safety performance. Although Shoei
decided to implement a system to address
rotational forces, it was crucial that the helmet not sacrifice any of its current safety standards. M.E.D.S. added an additional layer of safety to the
helmet without taking anything away from the helmet’s
original safety features. The M.E.D.S.-equipped VFX-EVO
is effective at any impact angle and just as effective as
its predecessor, the VFX-W, at both high- and low-speed
impacts. The new VFX-EVO meets both DOT and SNELL
Technology. The technology behind M.E.D.S.
was created to keep your skull and neck from
taking high-speed impacts in accidents. The
M.E.D.S. does not require any additional rubber
or plastic parts that could increase the weight of the helmet.
Future. The future of helmet safety
depends on the market’s demands, as
well as any new homologation standards
that may be implemented, like the FIM’s
new FRHPhe-01 helmet testing protocol that will be implemented in 2019. This is the first organization to include
rotational testing. ❏
M.E.D.S. Shoei’s Motion Energy
Distribution System (M.E.D.S.) is
a proprietary exclusive in the
new VFX-EVO helmet. This new
helmet offers a dual-layer, multi-density EPS
liner with the lightweight, impact-absorbing
and comfortable characteristics of Shoei’s traditional EPS helmet integrated with M.E.D.S.
to reduce rotational acceleration energy
to the head in an accident. The idea of
M.E.D.S. is similar to the popular MIPS
(Multi-directional Impact Protection System),
which you see in helmets from Fly Racing
and Troy Lee Designs. Both systems’ primary
objective is to reduce rotational motion.
EPS. The Expanded Polystyrene
System (EPS) is the traditional
foam system inside a helmet. It
is designed to absorb the energy
of an impact. Shoei’s dual-layer, multi-density
EPS provides impact absorption by utilizing varying densities of foam in key areas
around the rider’s head. Motocross impacts
can often cause sloshing of the rider’s brain
under rotational forces. Extensive testing
shows that M.E.D.S. is more effective at
reducing rotational forces than traditional
EPS designs alone, so Shoei has decided to
adopt the M.E.D.S. into its new VFX-EVO
helmet in conjunction with the normal EPS.
Compared to its predecessor (the VFX-W),
the new VFX-EVO reduces rotational acceleration to the rider’s head by 15 percent without compromising an ounce of performance.
Function. The M.E.D.S. is
anchored by a larger center
column. The inner layer of the
dual-layer system swings during
impact rather than staying stationary, allow-
ing its three strategically designed perimeter columns to
absorb the energy and disperse the heavy impacts. The
result is a reduction of rotational forces to the rider’s head.
Structure. M.E.D.S. only becomes effective
under a significant impact. It doesn’t add or
take away any sort of comfort for the rider.
Testing. There is no standard for rotational
energy testing on helmets. M.E.D.S. was devel-
oped based on published scientific research
on rotational energy, as well as Shoei’s own
in-house testing. In a nutshell, Shoei used a hybrid dummy
head that is dropped at a 45-degree flat impact angle against
sandpaper to create a twisting effect, like when a helmet
hits the ground. Shoei tested front to rear, side to side and
at oblique impacts with this procedure.
Weight. The M.E.D.S. does not add any
additional weight to the helmet. The full EPS
construction preserves the lightweight characteristics of the VFX-W helmet.
Shell. The shell size of the helmet does not
increase with the integration of the M.E.D.S.
system. The VFX-EVO with EPS is almost the
same size as its predecessor, the VFX-W, and maintains its
ABOUT THE SHOEI M.E.D.S. SYSTEM