OMNI Health Cotton Rolls are made of pure cotton, high absorbency and is flexible for easy placement. Also used to nose bleeds.Maintains Original Shape While Providing Controlled Absorption. No Chemical Whiteners or Additives. Non-Sterile General Use. For Nose Bleeds; place a cotton roll in your mouth, right under your nose, between your upper lip and gums. Leave it there for 5 to 10 minutes. The cotton roll applies pressure to the blood vessels that send blood to your nose.