These fast and extra adsorbent Silica Gel Moisture Absorbing packets, packaged in Tyvek, come in a one gram size (sold 5 Silica Gel Desiccants at a time) and a 1 oz size (sold individually). The greatest enemies of a well made survival kit are time and moisture. Silica Gel Moisture Absorbing Desiccants aid to prevent your survival item or kit from being damaged due to moisture. We have opened numerous kits and survival aids over the years only to find a great product damaged due to moisture trapped inside its container. Sealed Survival Fishing Kits are a prime example. This is why we at Best Glide ASE include one of these Desiccants in our Survival Fishing Kits. We recommend the small size Silica Gel Desiccant for small personal survival kits, survival kit tins and small survival fishing kits and the large size Desiccant for anything larger. * Meets FDA specifications for food and drug products. * Provides superior adsorption. Remains dry at maximum saturation. * Silica gel can adsorb 15% of its weight in water vapor in 2 hours. * Silica Gel is cheap insurance for your valuable items. * Aids to insure the integrity of your survival kit for years to come.