Well you have plenty of possibilities. There are some REAL nice stuff out there but I personally didn’t want to spend an arm and a leg.
I spoke with Ugly Dog Ranch a while back and asked for a custom sized vest based off of one from their normal line up and it works great. I use RCD's only and this vest (IMO) protects hard in the areas hit when a dog is locked on. It has plenty of padding and Kevlar in the neck/ chest and just enough over the shoulders. They stay VERY mobile and allows for FAST entry when the dog grips which is where most of my dogs get hurt. I do get small rubs after 5-10mi behind the horses but I can’t think of a better deal. The pic of my dog shows the vest without a cut collar. I love that Ugly Dog Ranch adds that high neck on the vest so the collar over laps.