Sexy Hair's Big Sexy Hair Root Pump Plus Humidity Resistant Volumizing Spray Mousse is a humidity-resistant volumizing spray mousse that helps you create big volume by pumping up the root with extra hold. It dispenses out as a spray and turns into a mousse to give tresses tons of volume. Apply to damp hair at the root to achieve phenomenal lift or dry hair to activate textural volume. It also protects hair from humidity to keep style from going flat. Great for heavy/thick hair.