The pack contains six humidifiers 69% sachets to maintain humidity in your cigar humidor. You open the protective plastic of one sachet and tidy it in the cigar cellar. It ensures this humidity level is maintained at the indicated rate. You have nothing else to do : it is really practical for every cigar lovers, beginners or experts. Let's check only that its pink pastille does not change in blue, which will indicate its end of life so you have to change it.