Activated charcoal and natural mineral blend. Absorbs odour without sprays or chemicals. The Shoe Deodorizer Balls work through activated charcoal and a natural mineral compound that draws moisture and odour molecules out of the shoe interior. Drop them inside the shoe after wearing. They work overnight without contact with the foot or insole. No fragrance added. No spray residue. The balls do not mask odour with a scent — they absorb the source. Each ball remains active for repeated use. Replace the set when absorption capacity is reached, typically after several months of regular use. Active material: Activated charcoal and natural mineral blend Method: Passive absorption, no spray required Suitable for: Shoes, boots, gym bags, sports bags Reusable: Yes Available in four pack sizes: 6, 12, 18, and 24 pieces. Each piece covers one shoe.