Thank you very much for your question. CoolSculpting is an excellent choice for patients looking to reduce isolated areas of fatty tissue, such as the stomach or flanks. The technique can eliminate 25-30% of the fatty tissue after a single treatment. Unfortunately, CoolSculpting does not affect tissue elasticity, so lax skin will continue to sag after treatment. However, without a photograph or an in-person examination, it is difficult to give you any more specific advice. I recommend that you schedule a consultation appointment with a board certified plastic surgeon, experienced in the CoolSculpting technique. He/she will perform an examination and carefully determine if CoolSculpting is the right technique to achieve the flat, smooth stomach you desire.