What Is RF Thermagic or thermal cool? The RF Thermagic or thermal cool system relies on heat to tighten the underlying layers of the skin. This produces an instantaneous and marked reduction in the appearance of wrinkles, jowls, and sagging skin in the neck or brow area. RF Thermagic or thermal cool is also an effective method of skin tightening for other areas of the body. It is painless, non-invasive, and requires no recovery time, yet offers immediate and consistently excellent results.