Hit-Air Advantage Buckles or w/Zipper NEW Top fast: 0.09 sec deployment time! The neck airbag , where most injuries occur, inflates first, followed by (in only fraction of a millisecond) the torso and hip airbag. The neck airbag is also significantly larger than the leading competitor's neck air bag. Versatile: for Eventing, Western and other equestrian disciplines, has optional chest padding, back padding, and side paddings. The new Advantage is also cooler to wear because of the open design. With all of these advantages, it is also more affordable costing hundreds of dollars less! ONE CARTRIDGE ALREADY INCLUDED