lt WHAT IT IS A powerful five-minute reconstructor that rebuilds and strengthens stressed physically and or chemically treated hair. WHAT IT DOES Lost or depleted amino acids are replenished with a high concentration of Quadramine Complex for maximum reconstruction and protection from the cuticle to the cortex. WHAT ELSE YOU SHOULD KNOW Weak and damaged hair is restored to its original strength and condition helping to prevent color loss and making your hair more responsive to styling. Joico K-PAK Deep-Penetrating Reconstructor was chosen as Favorite Hair Repair Treatment at the 15th Annual Stylist Choice Awards in 2015.