I do not know do not use them i would wait and see if needed most good dogs do not need i'am saying this because alot of people just think they need stuff because other people have it most dogs do not need'em been hunting hogs since the 50's and only had dogs that were cut that did not know what a hog was most of these dogs were house dogs or just pets. the dogs will learn the best with out the vest and cut collars. just tring to help the newbees i sell alot of dogs to newbees and end up training the newbees and the dogs. a needle,thread and cut and heal are all you need 1 time is most of the time all that is needed.if you think you need them someone on this forum will help. have fun hunting and good luck.:thumb: