The external part of the hair's healthy cuticle has a hydrophobic surface that resists penetration. Upon intense examination of the hair fiber, we have learned how very
complex a strand of hair really is!
The hair's outermost surface, (the cuticle), is covered by a unique fatty acid called 18MEA.
18MEA, is attached to the outside of the cuticle and is called The "F" Layer. It adds additional
protection to the cuticle which protects the internal structure of the hair.