Integra™ Boost™ Humidiccant uses a patented technology that releases or absorbs moisture, maintaining relative humidity in a contained environment at or about 62% relative humidity. Each individually wrapped Integra™ Boost™ packet includes a replacement indicator card, when the round dot turns from pink to blue, it's time to replace your Integra™ Boost™ pack. Available in 4 gram (2-1/4 in x 2 in x 1/8 in), 8 gram (2-3/4 in x 2-1/2 in x 1/8 in) or 67 gram (4 in x 6 in x 1/4 in) sizes.