Can absorb up to 60 percent of its own weight 800g not just for car can be used for wardropes cupboards bookcases store rooms cellar boat caravan and garage no electricity chemicals or batteries required dry after 3 months and re use like new helps prevent damp mould mildrew and condensation depending on the climate and environment the bag will remain effective for 1 3 months the bag can be renewed for re use 3 4 times before needing to be replaced to renew the bag either 1