When you wear your shoes, put Odor Absorbers back in the poly bag and reseal otherwise it will absorb odor and moisture from the air. When you feel your boot stay wet, it’s time to regenerate the Silica Gel. It’s one of the components of the Odor Abosorbers that absorbs moisture. Place it for a few hours on a heat source (radiator), it will expel the absorbed moisture and will be ready for use again.