Nothing can hold my dog. I take her for a walk and she slipped her collar. So I tighten it, she slips it again. So I get out the harness for car rides, she slips it as well. This harness goes over ger head, and has two straps that connect around her body. So I tighten up the body straps, no luck. I tighten the the neck portion, and still no luck. Its small enough now that it bunches her skin up around it when its fastened, and she still slips out of it. Does anyone have a solution as to what I can buy and put on her so she doesn't slip out on walks? she is an avid car chaser, and I'm afaid she'll be killed one day. lThisis the one I have now.