Super Light Weight Vest for Motorcycle riding is Hit-Air’s latest model for wearing over your favorite motorcycle or equestrian clothing. This vest incorporates Hit-air’s new super high speed airbag deployment system. The system deploys the airbag in .25 msec (0.25 sec)! By comparison the human eye blink rate is 300 to 400 msec or 0.3 seconds. **For english horse riding, you need to purchase a saddle strap for attaching the vest to your saddle**