Lasts up to 12 hours -For discreet cold sore treatment. Simply apply the patch, put make-up over it and go about your day with peace of mind -The blisters are covered and the risk of further infection from the wound is reduced (especially important when dealing with babies and young children, but also in medical professions) -It is individually packaged. Unlike creams, the pack of Compeed cold sore plasters does not need to be disposed of after opening -Is dirt, bacteria and water repellent -Proven to reduce crusting and scabbing.