The amika Shield Anti-humidity Spray is powered by an advanced encapsulating technology, that delivers sub-micron spheres into hairs’ cuticle to form an invisible anti-frizz, anti-humidity shield. The Best Defense. A controlled, time-release formula maintains this barrier to defend hair against frizz, dulling and dirtying pollution. Formulated with antioxidant-rich Sea Buckthorn Berry to nourish hair and defend against color oxidation, while UV filters guard from color-zapping UV rays. Its formula won’t weigh down hair.