Thank you for your question, ThermiTight will definitely improve loose skin in that area, keep in mind that non surgical options give only mild improvement compared to surgical lifting. Skin tightening can be done with a combination of vanquish, venus legacy, exilis, celllutone/Zwave. However for best results, an arm lifting procedure can be combined with a high definition procedure at the same time. I recommend a hi definition procedure like VASER liposuction. I use VASER HI DEF with ThermRF and fat grafting to get the most fat removal, skin tightening, contour and definition. This combination will give you the most toned result. I recommend getting a formal evaluation with a hi definition physique expert. Best, Dr. Emer