After injection there is a short period of time that Voluma can be molded, even that is a very slight amount. Doubt that you can reshape Voluma by sleeping on it after the first night. It is relatively thick and is meant to be injected deep in the tissues.
This is very unlikely to happen after Voluma injections. The product is slightly moldable during the first 2-3 days after injection and then becomes well integrated. Even during that early period it is difficult to move the product around to any appreciable degree. Best.Stephen Weber MD, FACSDenver Facial Plastic Surgeon