New It’s A 10 Miracle Leave In Product + Keratin 4OZ Set of 2 New, never used Smooth, sleek, and strong are all simpler than ever thanks to the essential Leave-In and effortless spritz-on application of It's a 10 Miracle Leave-In Plus Keratin. This lightweight, deliciously-smelling conditioner helps rebuild dry, brittle and damaged hair from the inside out.