I plan on trying to shoot for 65% RH in my new humidor. I almost ordered a whole cube of Boveda packs when I realized that with wooden humidors (vs my plastic OXO container) since the whole box naturally breathes a little, just because you put in a 65% Boveda doesn't mean that it stabilizes at 65%. It can stabilize lower than that (depending of course on the ambient humidity, in addition to other factors).