My opinion on this is a lot of the time it relates to how clean their gym clothes are. In Jiu-jitsu it's immediately obvious who the guys are that use their tra

My opinion on this is a lot of the time it relates to how clean their gym clothes are. In Jiu-jitsu it's immediately obvious who the guys are that use their training gear for more than one session before washing it (and they are the people no one wants to roll with). If people have clean gear and are sweating profusely (it's a very close proximity sport) it's rarely an issue if their gear is clean. Edit: training gear definitely has a lifetime too in this respect, at some point stuff just has a permemenent low level bad smell and at that point it's past the point of needing to be thrown away unless you want people to start thinking of you as the smelly training partner.