Our dehumidifiers are non-toxic: no harmful vapors, no chemical reactions or stains. Safe for foods, medicines, sensitive materials, electronics, clothing, collectibles, and more. We package top grade silica beads in containers that can be reused indefinitely: buy it once, use it forever. And unlike other dehumidifying products, our units require no electricity, no refills and no replacement parts. You can reactivate your unit easily in any conventional oven, so it can be used for a lifetime of moisture protection. Each Hydrosorbent Dehumidifier has a built-in indicator that signals when it is saturated and ready to be reactivated. Our dehumidifiers are fully guaranteed, 100 percent. If you experience any difficulties with one of our products, we will replace it or refund your money. Silica gel has been the preferred desiccant of government and industry for more than 50 years because it works so well, at very low cost.