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Alpinestars TECH-AIR OFF-ROAD Manual Del Usuario página 63

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must not be touching your neck when you tilt your head backward. If the back protector
of the System touches your neck when you tilt your head backward, this is a sign that the
back protector of the System is too big and may interfere with the helmet, resulting in a
dangerous riding condition. If this is the case the System is unsuitable for you and must
not be used by you.
The following table explains and summarize passive back protectors sizes already installed
in your vest:
Base Layer Size
International Size MAN
S
42-44
M
46-48
L
50-52
XL
54-56
2XL
58-60
Part 3: Motorcyclists' chest protectors
The Tech-Air
Off-Road System, is equipped with a non-removable passive chest protector
®
that provides protection to the upper chest including the sternum even if the System should
not deploy. This chest protector is certified as Personal Protective Equipment Category II,
under the Regulation EU 2016/425, according to the EN 1621-3:2018 standard. This product
is in compliance also under the corresponding UK legislation (Regulation 2016/425 on
personal protective equipment as it applies in GB).
The following information will help you to understand which type of passive chest protector
(among different types of chest protectors) is installed inside your Tech-Air
This standard permits two different kinds of Chest Protectors:
C = Full Chest Protector, which is a single piece chest protector. This provides protection to
the upper chest including the sternum.
DC = Divided Chest Protector, which is a two-piece chest protector. This provides protection
to the upper chest only.
The increased coverage of a Full Chest Protector may provide greater protection compared
to a Divided Chest Protector.
Research published by the European funded APROSYS study has shown that the distribution
of an impact load over the chest is of greater importance than the amount of energy
absorbed by a chest protector. As such EN 1621-3:2018 provides for two levels of protection,
Level 1 and Level 2. Level 2 protectors have been subjected to a force distribution test, as a
result these protectors will be more rigid than Level 1 protectors.
64 EN
User's Waist to Shoulder length
41 (16.1'') to 46cm (18.1")
41 (17.3'') to 46cm (18.9'')
41 (18.1'') to 46cm (19.7'')
46 (18.1'') to 51cm (19.7'')
46 (18.9'') to 51cm (20.9'')
Off-Road.
®

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