A skin-tightening device from Korea has been gaining attention, with some outlets reporting on its potential to melt facial fat and provide fast results with little pain. The treatment, known as XERF, is said to be popular in South Korea and has been brought to the US, with some dermatologists and celebrities reportedly endorsing it. However, it is unclear if the device being referred to in all reports is the same, as one outlet mentions a different product, the Medicube's Booster Pro X2.