The Hold 'Ems Invisible Earbud Retainers from Wein are skin safe, FDA approved, hypoallergenic adhesive strips designed to hold your earbuds comfortably in place on the exterior of your ear canal. 40 pair are included in the pack. The adhesion makes temporary and secure contact with your skin without applying retention pressure. They are designed to leave no residue on your skin upon removal. Hold 'Ems can be reused until their adhesion wears off at which point they can be replaced. The Hold 'Ems will work with any type of earbud and can be used to help secure your earbuds comfortably during work outs or at home.