When I had to drop from 75-80 down to 0 in pouring fresh rain, lost control for a second and had to swerve, she was in her vest. She is in training so it is this one from amazon. My partner (who was the passenger) looked back in that moment and saw her. She barely felt a thing and the vest did the job. She is a 47 lbs mix breed.
https://www.amazon.com/dp/B093GXKFT8?ref=ppx_pop_mob_ap_share
As for the belt, it is this one from petco.
Less important but this backseat cover was still helpful and she didn’t slide on it. I love it and it fits my chevy equinox beautifully.
https://www.amazon.com/dp/B07G642RMQ?ref=ppx_pop_mob_ap_share