REV'IT! Avertum Street Tech-Air Ladies AirbagDescription Made for ease of use in daily motorcycling life, the Avertum Street Tech Air Ladies airbag is designed and certified to be slipped over your jacket in a snap though wearing it under your garment is always an option. Because of the over the garment design, sizing is aligned: an S sized airbag fits over an S sized jacket, an M sized airbag fits over an M sized jacket, and so on. And to make life extra easy and safe weve integrated the option