Each one of these bags is packed in a sealed linen with a ring on top for easy hanging on a hanger or hook.  Charcoal bags are made from environmentally friendly micro-porous activated bamboo charcoal.  The charcoal contains millions of tiny porous holes that can create a healthy atmosphere in your home. They are reusable for 2 years! When this charcoal bag is saturated, in order to rejuvenate the bamboo charcoal bag, you need to place the charcoal bag outside in the sun once a month for at least two hours. You can reuse these charcoal bags without waste.