Can’t be left on overnight? Or does it need to be washed off?

Question

TeamDrIdriss · Accepted Answer

Flash Mask is a powerful  Glycolic acid-based resurfacing mask that exfoliates and evens skin tone. Flash Mask is designed to be used as a rinse off treatment. Apply the mask for 10-15 minutes and then rinse thoroughly with water. Avoid Flash Mask on the nights you use a retinoid  salicylic acid or other exfoliant. You can use Flash Mask as a rinse off treatment 1-3 times a week. We recommend patch testing prior to use to avoid sensitivity. Consistency over intensity.  Dr. Shereene Idriss has a hack where she uses this mask as a one step overnight routine  but please note this is at her own risk as she does not have sensitive skin. The recommended duration for use is up to 15 minutes before rinsing. After rinsing off Flash Mask  you can proceed with the rest of your nighttime skincare routine.