Revgear No Stink Deodorizers Combo Pack Neutralizes bad odors, Absorbs Moisture, Kills Germs Non-toxic, Odorless, Hypoallergenic. No Hazardous Chemicals or Fragrances Natural Charcoal Properties absorb moisture and eliminate odor Re-charge No Stink using direct sunlight to prolong the life of the product Designed for all footwear and athletic equipment.