SYNCHRO SKIN gelstick concealer 401 2,5 gr SYNCHRO SKIN gelstick concealer #401 2,5 gr is a lightweight, creamy concealer that delivers medium coverage with a natural finish. It is formulated with SynchroSkin Technology, a blend of ingredients that help the formula adhere to the skin and blend seamlessly. The formula also contains hydrating ingredients, such as shea butter and squalane, to help keep skin hydrated and looking supple. The concealer is suitable for all skin types and comes in a convenient stick format for easy application.