Review on 🚗 HouNa Seatbelt Adjuster & Protector Set - Safety Car Seat Belt Clip for Shoulder and Neck, Vehicle Locking Covers, Automotive Strap Positioner for Kids & Adults (4 Pack, Black & Gray) by Aaron Jensen

I was skeptical as they just snap on but I LOVE them! Since they fold completely around the "bottom" strap, then over the "top" strap and then snap together, they won't move/slip. I was afraid they would move towards the buckle but they stay in place. There is enough free play to fine-tune position, but not enough to slip out of position. There were four in the package - two black and two gray. Ideal for full size Chevy trucks and Lincoln sedans.