TOOTLES is a patented underwear with a removable activated carbon fabric filter that removes the smell of flatulence. The bikini undies are are a classic style that is comfortable for anyone, whether youâre managing a health condition, or trying to avoid an awkward moment at the office, on an airplane, or even while on a first date! The activated carbon fabric uses a process called "adsorption" that traps the smelly gas molecules. Each pair of underwear comes with an activated carbon fabric filter that is removable, so that you can remove the filter before putting your underwear in the wash. This ensures that you can maintain the filtering properties of the activated carbon fabric.