What is Collagen Volume Needle, COVA? While fillers inject gel-type substances under the skin to add volume, COVA induces skin regeneration and collagen production to naturally fill volume. You'll feel your skin plumping up over time! Fillers can sometimes clump or migrate after injection, but COVA is absorbed evenly within the skin, minimizing such concerns. COVA is composed of PDO, a component that naturally dissolves within the human body. Fillers can sometimes be noticeable or risk overcorrection when treated in thin skin areas like around the eyes or mouth, but COVA is more natural and suitable for such delicate areas. Side effects often reported with fillers, such as vascular occlusion or embolism, are not associated with COVA. It's a safer option! Compared to Juvelook Volume or other collagen injections, COVA offers significantly greater immediate effects due to its added physical support.