Have you heard about the Max 02 form system from UltrAspire? Max02 form is our adjustable sternum system which provides a custom fit conforming to body shape, size, and preferences on how you want the vest to fit. It is simple. The Max02 form has 2 shock cords, 1 on the right and left of the chest straps on some UltrAspire vests. The Max02 form allows you to pull just one or both of the shock cords & customize the fit, according to your body shape. Included on the shock cords are 2 small black c