RewBAY PLLA filler is made of PLLA (Poly-L-Lactic-Acid). Unlike existing fillers or Botox, it is a procedure that fills up the volume of the skin by injecting a collagen promoter that acts as a stimulant and creates new collagen and tissue without creating foreign substances in the body. Since PLLA filler is a procedure that promotes the natural synthesis of collagen in the skin, it is a procedure that allows you to get a natural sense of volume through steady collagen synthesis after the procedure rather than an immediate volume effect.