so my boys use puppia mesh harnesses (real soft) but my boy Milosh gets very startled at any popping noise ( motorcycle fire works pop etc...) hes gotten bettre but he once managed to escape the harness ( iam alsways 2 steps ahead so i catch him before he reacts) that said i notice many basenjis have collars= do they work better on keeping them safe?
I also prefer martingales, had always used thinner ones, though. Recently I got a handmade one that I simply love. I'll try to find the link.
But Leora's Samoyed pup came with a white pine martingale. I am really in love with it. Wide enough to not "choke" but not so wide that you don't have good control and tightness. http://www.whitepineoutfitters.com/
Because he is special needs, we have harnesses for him. I have never had a dog come out of a harness, so I am not sure if your fitting is off or what. With fosters, several needed harnesses (Rottweilers and Chows), Chows are awful about backing out of collars, not easy in a harness.
Took me a while but found her link:
Also, these are very well made