Try all 4 professional-strength hair treatments $24 ($28 value). Use these 5-minute treatments in place of conditioner. Apply after shampoo for shiny, silky, fortified, healthy-looking hair. Variety pack includes 4 single use 15 ml tubes. Pro Boost Seal locks in color, Pro Boost Hydrate deeply repairs and reduces frizz, Pro Boost Shine adds radiance and shine, and Pro Boost Strength adds strength.