Hydrolyzed silk, dimethiconol, and panthenol (smooth)
HOW IT FEELS/SMELLS/LOOKS:
The clear serum has a scent reminiscent of clean laundry.
WHY WE LIKE IT:
This is a Readers’ Choice winner for a reason: Just a few dabs make hair look smooth, shiny, and healthy—not greasy (so long as you don’t OD on the stuff). It’s superconvenient, too, because it can be used on wet or dry hair.