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, naturally filling in volume. You'll feel your skin gradually plumping up over time! Fillers can sometimes clump or migrate after injection, but COVA is absorbed and spreads evenly within the skin, minimizing such concerns. COVA is made of PDO components that naturally dissolve 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 thin areas, providing a more natural look. Side effects often reported with fillers, such as vascular occlusion or embolism, are not associated with COVA. It's a safer choice! Compared to Juvlook Volume or other collagen injections, COVA offers added physical support, resulting in significantly greater immediate effects.