GOBI DRY use water-absorbing crystals that indicates the degree of moisture by changing color. The crystals are of a new type which is completely safe unlike other self-indicating crystals. The crystals have an incredible ability to absorb water in the air - even at low temperatures, making them very useful. Moisture in an indoor environment can lead to mold, with subsequent health problems. What most people tend to forget is that a damp environment damages the material and accelerates the oxidation of cables and electronics. Mold starts to grow at a relative humidity higher than 60 %. Crystals in the Gobi DRY absorbs water at low temperatures and is therefore a well-used technology in both low-tech to high-tech dehumidifiers .