Semi Permanent - Eyebrow from Hair Studio 451 is a revolutionary treatment that allows you to enjoy smudge-proof and smoky brows for up to three weeks! Using a specialized combination of vegetable dyes and pigments, Hair Studio 451 is able to create a natural looking eyebrow shape and color. With this treatment, you won't have to worry about applying makeup or doing touch-ups, each day. The semi-permanent results will look natural and perfect for up to three weeks!