The Humidipak Restore System allows your instrument and case that have previously not been humidified or are in a known dry condition to return to the ideal humidity level without danger of over humidification. Using Boveda's patented two-way humidity control technology, this system automatically adds moisture at an accelerated yet safe, rate to re-establish the ideal humidity level inside your instrument case, eliminating the guesswork and anxiety of revitalizing your instrument. Use only when extreme dryness is an issue.