Product Overview This Leave in Conditioner is the best in the field It’s a 10 Miracle Leave-in Plus Keratin smooth, sleek, and strong are all simpler than ever thanks to the essential conditioners and effortless spritz-on application of It’s a 10 Miracle Leave-In Conditioner Plus Keratin. This lightweight, deliciously-smelling conditioner penetrates deep into the hair shaft to rebuild dry and damaged hair from the inside out. You'll see the results after one use.