Many dogs tend to pull a lot when they are excited to feel the nature or to meet the new furry friends. You want a harness that features NO-PULL DESIGN so that you can have a better control of your dog by attaching the leash to a FRONT CLIP. Every time your dog pulls, he/she got turned around instead of continuing forward and pulling on the leash. Soon your dog will learn not to pull.
I found the Rabbitgoo Dog Harness No-Pull Pet Harness on Amazon and it has all the features you should be looking for.