Shoe deodorizers generally fall into three categories: Chemical Absorbents, UV-C Sterilization, and Ozone (O3) Generation. Chemical options like Activated Bamboo Charcoal are eco-friendly and passive, ideal for moisture absorption. UV-C Light devices target DNA in bacteria and fungi to prevent reproduction, while Ozone generators provide deep penetration into shoe fibers to oxidize odor molecules. For B2B buyers, Ozone-integrated electric dryers are currently the highest-demand SKU due to their dual-action drying and sanitizing capabilities.