Once opened, our fragrances can last up to 10- 14 days or more under the right conditions. We ensure that the maximum amount of the highest quality fragrances is absorbed into the freshener during production, but how long the fragrance lasts once opened depends on a number of environmental factors. On average, we get feedback from our customers that they have a pleasant smell of fragrance for at least 10-14 days or more. Tip… If you only remove part of the wrapper, the fragrance can last up to four weeks! Left unopened in a cool, dry place, the fresheners can be stored for 2 years or more.