WHAT IT IS For hair that s lacking body and vitality Volume Boost Dry Shampoo infuses body into fine and weak hair. WHAT IT DOES Schwarzkopf Professional BC Bonacure Volume Boost Dry Shampoo adds 100 more volume to limp locks. This dry shampoo has a lightweight formulation that doesn t overburden fine and limp hair but there rsquo s nothing lightweight about the results. Completely silicone-free the 3-step system infuses stability fullness and hydration into every strand while lifting roots and refreshing hair between shampoos for 72 hour volume and shine.