AmikaAmika Bust Your Brass Violet Leave-in Treatment Foam

BUY at Birchbox

Whether you're a natural blonde or not, brassy tones have probably transformed your precious color before. This innovative foam counteracts them but is meant to be used postshower as part of your styling routine, so your shampoo and conditioner can tackle other things you want to focus on (think: frizz, detangling, clarifying). When applied to damp hair before heat styling or air-drying, the formula dispenses optical brighteners that enhance your blonde's luster while hydrating and softening str