Designed to work with your Himalayan salt inhaler, this bag of salt refills is designed to last you for approximately one year based on how frequently you choose to use your salt air inhaler. Touted by many experts, Himalayan salt inhalers have been shown to be helpful with alleviating a range of breathing difficulties. In order to achieve the maximum amount of benefits, it is recommended that you use the Himalayan salt air inhaler for approximately 20 minutes per day. Your Himalayan salt will need to be replaced approximately once per month. This bag will last between 3 months and one year depending on frequency of use.