[ Moisture Indicating Desiccant ] - Contains orange indicating silica gel that enables users to quickly determine when desiccant needs to be recharged or replaced, the orange crystals changing color to blackish green as it becomes increasingly saturated with moisture. | [ Reusable Desiccant Packets ] - Rejuvenated by microwave or oven, microwave at DEFROST with several mins, oven temp setting < 230°F, recharge as instruction. Do NOT recharge until the packets eventually saturate, otherwise, they probably be melted or scorched by overheating. | [ Safe Double Packing & Easy Storage ] - 5 grams x 60 packs, vacuum-packed inside, an aluminum foil ziplock bag sealed outside, to protect the desiccant packs from moisture before use, also easy to store the unused sachets. | [ Food Grade Silica Gel ] - With high moisture absorption up to 35% as own weight. Cobalt chloride free, nontoxic, no harm, no pollution, safe to be used with foods and pharmaceuticals. Suggest using orange indicating silica gel instead of blue one. | [ 100% Satisfaction Guaranteed ] - If you're not happy with us, contact wisedry customer support team directly for a fast solution any time needed.