These seats are attractive, and offer better comfort and support. However, they offer no additional impact protection, since they don't have shoulder belts. The function of a seat belt is:
a. Keep your lethally traumatized body in the vehicle, so
b. The coroner's work is easier.
If going to all this trouble, GET SHOULDER BELTS!! A functioning shoulder belt prevents most upper body - and face - blunt trauma. The air bag really adds very little protection.I plan to install Sebring convertible seats in my 63 SF vert...with the integral shoulder harness.