The ladies hi-waisted brief fits much higher on the waist, above the hips, and lower on the leg than our regular brief. This classic flatulence filtering underwear style gives the added comfort and confidence which many of our more mature customers are looking for. 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.