ThermiTight or threads for sagging neck and jowls? (photos)

With the degree of skin laxity that you have, you would be best served by a surgical face/neck lift. If you are against surgery then ThermiTight would be the best non-surgical treatment to tighten up your loose neck skin. The results are more subtle than surgery, but without the risk. You may need multiple treatments over time depending on your goals. The best thing to do is set up an in-person consultation and evaluation with a physician in your area. Best of luck.

ThermiTight works well in general for necks of loose skin and fat accumulation, but less for muscle bands.  Threads may help lift the jowls but the question is what is the duration of their effectiveness. ThermiTight can help in patients to lift their jowls but those with bad sundamage or poor nutrition, or chronic smokers will not be expected to do as well.The information provided in Dr. Shelton's
answer is for educational purposes only and is not intended
to constitute medical advice. The information provided should
not be relied upon as a substitute for consultations with a qualified
health professional who may be familiar with your individual medical
needs.

The best way to answer your question is to ask yourself what kind of results you wish to have from a procedure.  Thermitight, Ultherapy, and other less invasive technologies have the advantage of avoiding a surgical recovery, but have the disadvantage of a much lesser result.  In my experience, most patients with the aging changes shown want a fairly substantial result, and this means having a facelift with platysmaplasty.  Some patients are willing to have a lesser result because they are unwilling or unable to have surgery.  However, for other patients, these lesser results end in disillusionment despite having been counseled about expectations. The biology and physiology of aging haven't changed and there is no minimally invasive technology that produces similar results to surgical intervention.