New 2020 version equipped with better technology Clinically-proven to kill up to 99.9% of harmful fungus and bacteria in shoes. Treats the entire shoe from toe to heel with UV light. Works in just 15 minutes and is 100% ozone free. Ozone hurts the environment and according to the EPA can potentially cause harmful health consequences. Dries shoes with a built in fan, active deodorization system with scent pouches, and meets UL’s stringent safety standards. Only the SteriShoe+ is built with a rugged steel frame (and not just plastic) for years of funk-free shoes (one year warranty).