After Ultherapy what's the best treatment for sagging skin in legs ? Thermage,Pelleve or RF (and what kind of radiofrequency) ?

Without an in-person consult and evaluation to assess the sagging skin on your legs, it would be difficult to recommend the best treatment solution. We have used radiofrequency using a Viora 30 to address sagging skin to stimulate collagen and tighten skin over 7-9 appointment about two weeks apart. If surgery is not an option for you, RF could yield you the improvement you're seeking over several consecutive months.

There are many options for skin tightening on the legs.  You need a formal consultation to determine what is best in combination.  Best, Dr. Emer.

You would need an in-person consultation and evaluation to determine which treatment would be best for your situation. In general, my favorite non-surgical treatment for tightening loose skin on the legs is ThermiTight. ThermiTight uses Radiofrequency energy to create heat and stimulate collagen production. Please see an experienced provider. Best wishes.