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Alpinestars Tech-Air 5 System Size Chart

The Tech-Air 5 Vest is designed to 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 5 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 5's upper operating limit of 122° F.
Size Euro Size US Size Chest (cm) Waist (cm) Hip (cm) Arm (cm) Height (cm)
XS 40-42 30-32 78-86 64-72 79-87 49-52 150-163
SM 44-46 34-36 86-94 72-80 87-95 52-56 163-171
MD 48-50 38-40 94-102 80-88 95-103 56-60 171-179
LG 52-54 42-44 102-108 88-94 103-109 60-63 179-185
XL 54-56 44-46 108-114 94-100 109-115 63-66 185-191
2XL 58 48 114-118 100-104 115-119 66-68 191-195
3XL 60-62 50-52 118-124 104-110 119-125 66-68 191-195
4XL 62-64 52-54 124-130 110-116 125-131 68-70 195-199

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.
  • W Waist
    Measure around your natural waistline, around the top of the hip bones, inline with the navel while keeping the measuring tape parallel to the ground.
  • HP Hips
    Measure the circumference, from pelvic bone to pelvic bone, at the widest part of your hips below the waist.
  • H Height
    With no shoes on, stand with your back against a wall and your feet together. Measure from the floor to the top of your head.
  • A Arm (Shoulder to Wrist)
    Standing up straight with your arms at your sides, measure from the Acromion or summit of your shoulder, down to your wrist bone, along the outside of the arm.
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