The hipster is a popular, contemporary style of flatulence filtering underwear. This style offers good flatulence filtration and a very comfortable fit. The taut waistband and material content provides more support than ordinary underwear. Shreddies flatulence filtering underwear features a ‘Zorflex’ activated carbon back panel that absorbs all flatulence odors. Due to its highly porous nature, the odor vapors become trapped and neutralized by the cloth, which is then reactivated by simply washing the Shreddies. Do not use fabric softener when washing Shreddies.