WHAT IT IS Add 100 more volume to fine to normal hair that s lacking body volume and vitality with this purifying shampoo. WHAT IT DOES Schwarzkopf Professional BC Bonacure Volume Boost Shampoo leaves your hair feeling fuller for up to 3 days. This silicone-free formula is lightweight so as not to overburden fine and limp hair but there rsquo s nothing lightweight about the results. 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.