How long will the aromatherapy last?

Every time you heat your wrap or critter, you are using a little bit of the aromatherapy. Make sure not to over heat as that will burn it up faster than anything. It could last weeks, months, or a couple of years, depending on you. We do carry spritzers of refresher oils. When the aromas wear out, you will still have a hot/cold wrap, just unscented.