Volume Shampoo is a sulfate-free formula that gently cleanses and helps thicken the hairs' structure for incredible lift and extreme volume. An exclusive Volume Boost Complex of body building amino acids and proteins infuses hair with long-lasting volume while strengthening and protecting each strand. The end result is full, healthy hair with radiant shine and noticeably better retention of the Brazilian Blowout treatment and color services for those with fine or thin hair.*