Skin Boosters, also known as Micro Filler, is an injectable treatment that hydrates and smooths the skin. Skin boosters are very fine dermal fillers that are injected into the skin (not under the skin like dermal fillers) to hydrate and improve skin quality. In young skin, a skin booster can give an airbrushed or filtered appearance to the skin. In older skin, a skin booster can reduce the appearance of crepey skin.