Finally a product that  controls humidity safely and successfully in  our  cases!  I first  heard  about Boveda from  it's cigar products. The  disposable packs keep the  humidity steady by  taking out moisture in the  air  when  it  is too humid and aging moisture to the  air when  it is too dry.  If you  keep  your  case  closed  while you  have the  instrument out, these  packs last about 2-3 months. The starter kit comes  with  2 humidity packs so about 6 months of humidity  control. It also  comes  with  instructions and  a very  nice  sack to  look  beautiful in  your  case.  It's a good idea to have extra packs.  Please  watch  the  short video  where  I show you  how to  use  this  amazing product. It is a must  have  product as  it  keeps  our  instruments safe  and also  helps  keep  our  instruments in tune!