While in the lab, a P&G scientist snipped off a few locks of my hair to be analyzed under the microscope. What you see here is an up-close look at a single strand. It measures 68.7 micrometers in diameter, so it's classified as fine hair. Disappointingly, the hair damage includes "slight cuticle edge chipping," but it's cool. My inner Ms. Wizard is still excited, and the mild damage means there's just one more reason to use conditioner.