What is Collagen Volume Thread, COVA? While fillers inject gel-type substances under the skin to add volume, COVA induces skin regeneration and collagen production to naturally restore volume. Experience your skin plumping up on its own over time! Fillers can sometimes clump or migrate after injection, but COVA is absorbed and spreads evenly within the skin, reducing such concerns. COVA is composed of PDO (Polydioxanone), a material that naturally dissolves within the human body. When fillers are used in thin-skinned areas like around the eyes or mouth, they can be noticeable or risk overcorrection. COVA, however, is suitable for these delicate areas, offering more natural results. Side effects often reported with fillers, such as vascular occlusion or embolism, do not occur with COVA. It's a safer choice! Compared to Juvelook Volume or other collagen injections, COVA offers significantly greater immediate effects due to its added physical support.