Ultherapy PRIME® delivers high-intensity focused ultrasound (HIFU) to the SMAS layer deep within the skin. The focused ultrasound creates micro-coagulation points at each treatment spot, stimulating collagen production and tissue contraction for a natural lifting effect. Real-time ultrasound imaging allows the practitioner to visualize the layers and target the desired depth precisely. By acting on the deep SMAS and fat layers, Ultherapy PRIME® helps define the jawline and lift the skin.