It all depends on what kind of environment you live in and how often you use it. The typical shelf life KandyMask is around 6 to 12 months. Once you notice it becoming harder to breathe through the material it is usually the time to replace it.
Please read the full guide on how to choose the right size here or check out the chart below. We typically like go by persons height to choose the right size. We have 4 sizes which are small, medium, large and XL.
