Tween Time is a one of a kind instant temporary color crayon. Blends gray. Colors regrowth instantly. Applies like lipstick. Shampoos out. Perfect for concealing small areas of gray or covering/blending re-growth area at the scalp. Roux's Tween Time formula is easy to apply and is non-damaging' so it can be used everyday. Perfectly blends to cover up re-growth area. Camouflages the first signs of gray.