Automotive or residential DeOdorPro® Gas Release Packs are a powerful and convenient solution for eliminating various types of smoke smells, utilizing Chlorine Dioxide. The “set it and forget it” method makes tackling odours at their source easy, particularly in temporarily unoccupied and confined spaces. Especially beneficial for situations involving fires, cigarettes, cannabis, or electrical smoke, as well as for controlling mold, mildew, and other odor-causing bacteria. Small 25g: Our DeOdorPro ® 25-gram Chlorine Dioxide gas release packs are perfect for smaller spaces (50 to 100 cubic ft), compact cars, bathrooms, etc. Medium 50g: Our DeOdorPro ® 50-gram Chlorine Dioxide gas release packs are perfect for medium spaces (100-200 cubic ft), full-size cars, bedrooms, small boats, etc. Large 100g: Our DeOdorPro ® 100-gram Chlorine Dioxide gas release packs are perfect for large spaces (200 – 500 cubic ft), SUVs, kitchens, boats, RVs, etc. The 21st Century alternative to using an Ozone machine!