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Alpinestars Tech-Air 3 System Sizing

The Tech-Air 3 Vest can be worn under any properly fitting textile jacket, keeping in mind that the jacket must be large enough to accommodate the expansion of the airbag in the event of a crash. For textile jackets, riders need 4cm of additional space around the circumference of the body. Riders who wish to wear a leather jacket that is not Tech-Air compatible must be sure that the leather jacket has an additional 4cm of space around the circumference of the entire body. Riders can also pair the Tech-Air 3 Airbag vest with any Alpinestars Tech-Air compatible jacket that features airbag expansion panels. *Not intended for use with heated riding gear; heated gear exceeds the Tech-Air 3's upper operating limit of 122° F.
Over Jacket Size Chest (cm)
XS 98-108
SM 104-114
MD 110-121
LG 116-128
XL 122-134
2XL 128-141
3XL 134-148
4XL 140-155
Under Jacket Size Chest (cm)
XS N/A
SM N/A
MD 95-101
LG 101-107
XL 107-113
2XL 113-119
3XL 119-125
4XL 125-131

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.


How to Measure

  • C Chest
    Measure around the fullest part of your chest, under the armpits, keeping the measuring tape parallel to the ground.
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