Olaplex Nº4 & Nº5 Double Volume Fine Hair Set: For Stronger, Fuller Hair

If you’ve ever wished for fuller, stronger hair without the heaviness of traditional products, Olaplex has the answer. The new Olaplex Nº4 FINE Shampoo and Nº5 FINE Conditioner, available together in the Double Volume Fine Hair Set, are specially formulated to transform fine hair — adding volume, strength and hydration, all without weighing strands down.

Why choose the Fine Hair Set?
This duo is clinically proven to:

• Instantly double hair volume and keep it lifted all day
• Strengthen fine hair while protecting against damage
• Deliver weightless hydration for softness and shine

With over 750 reviews and an impressive 4.6-star rating, it’s already becoming a go-to routine for those with delicate, flat or easily weighed-down hair.

How is it different from the original Olaplex formulas?
Both the Fine Hair Set and the original Olaplex Nº4 and Nº5 Bond Maintenance® formulas help to rebuild broken hair bonds, but the new Fine versions are designed with lightweight care in mind:

• Nº4FINE Shampoo – An ultra-light formula that lifts at the roots, volumises instantly and strengthens strands, without protein or heaviness.
• Nº5FINE Conditioner – A featherlight conditioner that hydrates and reinforces fine hair while maintaining bounce and body. Unlike the Nº.5 LEAVE-IN™, this formula is rinsed out after use, ensuring a clean and airy finish.

Who is it for?
The Double Volume Fine Hair Set is perfect for anyone with fine, flat or lifeless hair who struggles to achieve long-lasting body. It works across all hair textures but is especially beneficial for hair that:

• Feels limp or weighed down easily
• Needs extra strength without added heaviness
• Is prone to losing volume throughout the day

How to use it

1. Start with Nº4 FINE Shampoo: Apply to wet hair, lather, and rinse thoroughly.
2. Follow with Nº5 FINE Conditioner: Distribute evenly through lengths and ends, leave for a couple of minutes, then rinse out.
3. Style as usual and enjoy instant fullness and healthy-looking volume.

The verdict
With Olaplex’s patented bond-building technology and new lightweight formulations, the Nº4 & Nº5 Double Volume Fine Hair Set offers the best of both worlds: stronger, healthier hair with visible, all-day volume.

It’s a must-try for anyone ready to give their fine hair a rebirth of bounce, body and strength.

Source: Olaplex.com