Moisture and Odor Control for Shoes, Sporting Goods Equipment, & Just About Anything Else. If it Stinks, You Need Odor Check! Odor Check inserts use the most effective moisture and odor removal technology, making them the premier odor control money can buy. They feature a synthetic amorphous silica, a highly absorbent desiccant. Together they provide an activated carbon technology odor-control system that is used by athletes, hunters and women who can't stand the smell of their husbands gym bag! Odor Check is extremely easy to use. The simplicity of it is its key to success. When Odor Check is placed in your shoes, sports bag or vehicle, it removes the moisture and odor over the span of just a few hours. The odor eliminating technology absorbs and retains the moisture and odor leaving you with pleasant odor free apparel or car. All you have to do is insert Odor Check, give it time and enjoy! Odor Check inserts will dry out most shoes, skates, boots, gym bags and equipment in as little as 2-3 hours, but for maximum effectiveness let it work overnight or between games and practices. With regular use, Odor Check inserts help keep your gear fresh between uses, reduce moisture that cause skin irritations, and extend the life of your equipment. Odor Check can even be used to extract odor out of small enclosed spaces like lockers, closets, and even your vehicle!