N.4 Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low Sort by editor review Added to wishlistRemoved from wishlist 0 Add to compare Olaplex N°.4 Bond Maintenance™ Hair Strengthening Shampoo: Repairs Damage & Defend Against Future Breakage | Replenishes Hydration | For Coily, Curly, Straight, and Wavy Added to wishlistRemoved from wishlist 0 Add to compare $34.00