The EpilSmart diode laser is a three-wavelength 755 + 808 + 1064 nm laser. These longer wavelengths penetrate deeper into the skin, avoiding damage to the melanin in the epidermis, and have a direct effect on hair follicles. The longer wavelength helps to avoid skin damage and pigmentation changes that can occur with shorter wavelength lasers. The diode laser is ideal for all hair types.