pH: 4.5-5.5. MWS: 150-2500. Quadramine Complex. This rinse-out or leave-in conditioner restores moisture and softens dry, hard-to-manage hair. Contains Quadramine Complex, and exclusive blend of positively charged, low molecular weight and size proteins (MWS 150-2500). This balance of 19 essential amino acids (the building blocks of hair) adheres quickly and effectively to ensure maximum protection and reconstruction from the cuticle to the cortex. Made in USA.