[HAIR LOVE] Do you know how to determine Hair Formation? Using the below descriptors, we created the Hair Formation System, our global classification of hair based on the eight categories ranging from Class 1 to Class 8. ​ Curve Diameter (CD) ​ Curl Index (I)​ Number of Waves (W)​ Number of Twists (T)​ Swipe to learn more about how to determine and care for each formation, including the style challenges, hair attributes, and haircare recommendations. Click the link in bio to learn Hair Love on @lorealaccess. #lorealpro #lorealprous