Two-way Humidity Control for reeds Reed Vitalizer offers maintenance-free reed storage. The patented Humidipak technology uses two-way humidity control to keep your reed tips flat and prevent cracking and warping. Reed Vitalizer control packs will last 45-60 days. When the pack becomes hard, discard and replace with a new pack. Stores reeds at ideal humidity level -- self-regulates to 72% humidity.