Heininger  1027 CommuteMate Seat Belt Strap Adjuster
With the Seat Strap AdjusterTM clipped to you seatbelt, the shoulder strap will sit where you want it to.  Still providing an effective working seatbelt. The Seat Strap AdjusterTM is made to work with a three point seatbelt, making the shoulder strap maintain an upright position in case of impact.  This innovative product takes into consideration that not all standard seatbelts fit everybody, offering safety and comfort in one simple package.