Exilis is the FDA approved non-invasive treatment for body shaping and skin tightening. It uses monopolar RF (radio frequency) to deliver controlled heat approximately 1-3 cm under the skin.Ultherapy is FDA approved for non surgical tightening of the skin using high frequency ultrasound and is time tested and effective in treating laxity of the skin of the face, neck, decolletage. It is also FDA cleared for a non surgical eyebrow lift. Read the Ultherapy book on the link below.