Integra Boost 4-gram 2-Way Humidity Control packs at 62% RH are designed to maintain optimal humidity levels for stored items such as herbs, tobacco, and food products. These packs work by either absorbing or releasing moisture as needed, ensuring a stable environment that prevents mold growth, overdrying, or loss of potency.Each pack contains a patented salt-free solution that regula... https://www.hydroponicstown.com/integra-boost-4-gram-2-way-humidity-control-at-62-rh-1000-pack