Sleep serum by Oskia TLC for your skin Lightweight, non-greasy, deeply penetrating serum Designed to be used at night Containing a complex rich in Vitamins C and E Aims to help firm and plump the skin Apply one to three drops on your treatment area Use two to three evenings per week Follow with a moisturiser or oil Retinoid treatments can increase your skin’s sensitivity to sunlight You’ll want to follow with an SPF cream Product is non-returnable for hygiene reasons