Olaplex No.4 + No.5 Duo contains: 
 
Olaplex No.4 Bond Maintenance Shampoo 250ml 
A repairing, moisturising shampoo, designed to work with the ever-popular Olaplex No. 3 treatment to rebuild and strengthen your hair. 
 
Olaplex No.5 Bond Maintenance Conditioner 250ml 
A rich, concentrated conditioner for damaged hair. Made with the same bond-building technology as the rest of the (excellent, if you ask us) Olaplex range. 
 
BENEFITS OF OLAPLEX NO.4 + No.5
Strengthens and repairs hair structure.
Repairs and maintains bonds within the hair.
Eliminates frizz and flyaways.
Reduces breakage.
Restores internally and increase moisture levels.
Re-links and maintains bonds.
Improves shine and manageability.
Strengthens the hair.
Does not weigh hair down.
 
HOW TO USE OLAPLEX NO.4 + NO.5
Apply a dime size piece to wet hair.
Massage and rinse out.
After using OLAPLEX No.4 Bond Maintenance Shampoo, apply a generous amount from scalp to ends.
Leave on for 3 minutes or more.
Rinse out.