Farts can be an embarrassment, especially when you let one loose by accident and stink up an entire room. While there isn't much you can do to muffle the sound, you can filter out the smell with a special pair of undergarments.
Shreddies look like normal underwear but have a special carbon fabric filter in the back that creates an odor wall around your butt. When you pass gas, the unpleasant smell gets trapped and mostly scent-less air passes through instead. On top of saving you from embarrassing moments so you can "fart with confidence" (that is, apparently, the Shreddies motto), they actually look like regular underwear so you don't have to sacrifice any comfort or style. The only downside is that they're pretty expensive, coming in at $60 a pair unless you buy a multi-pack. Still, if you can't control your farts, it's hard to put a price tag on that kind of peace of mind.
Shreddies (~$60)
Shreddies Underwear Filter Out the Unpleasant Smell of Your Farts