Silica Gel Beads: 2-4 mm（90% transparent beads + 10% orange beads). No change in size or shape even if the silica beads become saturated with moisture. The beads will continue to feel and look dry. Each packet is self-sealed, strong, and tear-resistant. Silica gel can absorb 40% of its weight in water vapor and 15% in the first two hours. Color Indicating: The orange beads change color to blackish green when they become saturated with moisture. Our desiccant packets are Cobalt chloride-free, non-toxic and odorless. Absorb moisture without any chemical reactions. They are recommended to be reused no more than 3 times.