Hasu BFE MaskHasu BFE Masks Superior protection with certified BFE 99%. Very thin and light weight Elegant and gives a sharper V shaped look Breathable and smooth on skin. Washing instruction: Wash by gently rubbing with your fingers with soap and water. Or soak in soapy water for 10mins and rinse with clean water. No machine wash, no wring. Quick dry. Use a lukewarm iron if necessary. Special: Now comes with a free copper coated pouch to keep your mask. Copper is