In the early 1950s, our founder
had a passion for motorcycles
and created a prototype
helmet for his own personal
protection. That modifi ed
industrial helmet was the
fi rst motorcycle helmet
created in Japan.
During those early days, there were
no standards or any established
procedures and practices for motor-
cycle helmet design, particularly with
respect to protective features. Such
protective features, including absorp-
tion materials, are necessary to soft-
en the impact to the rider's brain from
violent impacts with the ground or
obstacles.
The solution our founder developed
was the EPS liner. Along with being
lightweight, it remains e ective at
impact absorption from the extreme
temperatures of -20C to 50C—
well outside the range of the normal
human condition.
In the late 1970s, Arai resolved to
create a helmet with unrivaled head
protection. What Arai developed was
the industry renowned EPS liner.
EPS liner technology that is
for more than just absorption.
The skill to create this liner is
essential for achieving a more
uniform thickness and the
ideal egg-shaped form of an
Arai helmet.
Based on the data from
countless drop tests, the
zones of each di erent
density have been carefully
refi ned. This is done for each
shell size within each helmet
model.
Where impacts must be
dealt with in the narrow
forehead area of the hel-
met, the bottom portion
of the EPS liner (left pho-
to: blue portion of the lin-
er) has a di erent density
incorporated. This denser
section helps prevent the
liner from being too thick.
The fi nely tuned balance of EPS
densities in Arai liners is not
something that can be seen once
the helmet is assembled, but such
a hidden attribute is among the
many details that Arai consistently
pursues for the improvement of
impact performance.
When taken out on the road or track, even a helmet as
highly regarded as an Arai may be faced with situations
where it can be overwhelmed.
No helmet can protect against all possible impacts.
Acknowledging this harsh reality is tough. But this
reality motivates Arai to always pursue advancements,
even if small, to improve rider protection.
It is that constant pursuit of gains in protection that
spurs us to make helmet the way we do. Arai itself is the
accumulation of all things that may lead to strengthen-
ing our helmets.
S C A N T O S E E T H E
VA L U E O F A R A I V I D E O
S C A N F O R W E B S I T E
