This reusable bamboo activated charcoal is an all-natural, non-toxic way to absorb and neutralize unwanted odors from your car or home. The breathability of the bag make is easy to use anywhere. You can reuse this bag for up to two years. Simply put your charcoal bag in the sunlight for a couple of hours each month which will help release all the odors it has absorbed. For best results, keep one bag in your interior cabin and one in the trunk.