I have been performing nonsurgical filler necklifts for nearly two decades. More recently, these typically entail the use of a hyaluronic acid-based lifting filler, such as Juvederm Ultra Plus XC, injected on both sides of the back of the neck alongside the cervical spine, which leads to tightening of the neck toward the front. Additional lift can be obtained by the use of slightly less robust hyaluronic acid filler, such as Restylane L, placed in a bolus like fashion on the neck in the region behind the ears, and finally a uniqure, hyaluronic acid-based bioremodeling agent, such as Profhilo, injected in a fanning method to each of the sides at the front of the neck and a bolus of it placed centrally at the angle between the neck and the jaw. Unfortunately, the latter agent is not yet available in the U.S. (I have been using it for several years in my Israel satellite facility, where a far greater number of regulatory agency approved fillers and volumizers are commercially available). In my Manhattan practice, I instead use a skin booster filler, such as Restylane Silk for the latter purpose. The whole procedure should take no more than about fifteen minutes in experienced hands and entails little to no significant downtime. I would not recommend a permanent filler, such as Bellafill, since permanent fillers can translate into permanent problems, such as disfiguring lumps and bumps, that may arise immediately after injection or five, ten or even twenty years later. Make sure that you seek consultation with a board certified aesthetic physician and ask to see his/her personal before and after photos. Best of luck.