HASK BIOTIN BOOST Thickness Shampoo and Conditioner 25 Pack. HASK BIOTIN BOOST Thickness Shampoo and Conditioner  25 Pack. Kit includes | 1 Shampoo and 1 Conditioner to strengthen Fortify | Transform fine, flat strands into fabulously fuller hair with the Biotin Boost Thickening Shampoo Infused | With an invigorating herbaceous scent Go big or go home with tri level thickening | Volumize, strengthen and fortify your locks Free of | Sulfates, parabens, phthalates, gluten and drying alcohol. BOX 29.  X