Standard model of integrated airbag harness; Larger areas of the airbag air chamber to maximize the use of CO2 gas. The fixed storage buttons on each area of the air chamber will instantly fall off and inflate the air chamber. As the harness is free around the shoulders, we have made it about 3 sizes wide, and the waist adjustment belt allows you to adjust the size. From spring and summer jackets to cold weather jackets, it can be worn over a jacket throughout the season.