This reparative leave-in conditioner softens and detangles hair while controlling frizz. This Shea Moisture Jamaican Black Castor Oil Strengthen, Grow & Restore Leave-in Conditioner softens and detangles hair while controlling frizz. Perfect for those who regularly color, straighten, perm or heat style their hair, as well as kinky, curly or wavy styles. Shea Moisture is a PETA certified cruelty-free brand; they do not test any of their products on animals.