6. O&M The Power Base Protein Mask
If your hair needs some TLC but you're afraid a mask will leave your hair thin and unworkable, try this Power Base Protein Mask. O&M is specially formulated for hairdressers by hairdressers, so you know it works. The protein-rich mask is a must-have for weakened hair, because it helps bind broken hair strands, giving you fuller locks. 

O&M The Power Base Protein Mask, $36, Sephora