Reduces allergens and eliminates odors caused by moisture. Prevents mold and mildew stains and protects against moisture damage. Absorbs 50% more moisture than the closest competitor. Each pack lasts up to 60 days. (4) 10.5 oz. refill packs per box. Refer to Model No FG90 (SKU 633210) for DampRid Super Absorbing System. Refer to Model No FG91 (SKU 635183) for DampRid Easy-Fill system.