BTL Exilis is a combination laser that uses ultrasound and radio frequency waves to tighten skin and dissolve unwanted fat cells. It is used for non-invasive body contouring and there is no social down time. A series of treatments is necessary to tighten and lift skin. Controlled heating and cooling ensure that energy is delivered to various depths in the tissue. Changing power and cooling during treatment allows the provider to treat deep tissue all the way up to the superficial layer.