Prepare the way for beautifully defined curls with BOING Curl Leave-In, a lightweight, yet powerful spray that goes on wet hair to detangle and protect curly hair by delivering moisture-retaining proteins and plant sourced ProV vitamins deep into hair roots, leaving hair hydrated, shiny and frizz-free. You can also use BOING Curl Leave-In on dry hair to refresh and re-boing curls.