No 4 Curl

Olaplex No 4 Hydrating Curl Shampoo for coily, curly, and wavy hair delivers multi-action care to instantly strengthen, hydrate and target your hair’s unique combination of needs, no matter your pattern. Powered by Olaplex's patented 3D Bond Shaper™ and Hydra-Define™ technology, it helps reinforce weakened areas while supporting softer, smoother, more defined curls. Use No 4 Hydrating Curl Shampoo with No 5 Hydrating Curl Conditioner for 50% less frizz—even in high humidity—and easier detangling for softer, more manageable curls. No 4 Hydrating Curl Shampoo's silky, creme-gel formula provides essential slip to prevent tangles. It removes buildup without stripping for light, clean hair between wash days for 7-day hydrated curls. No 4 Hydrating Curl Shampoo's scent is a re-imagined take on Olaplex's signature, opening with crisp, invigorating notes of Sugared Mint, followed by a bright burst of Grapefruit Zest, Ginger, and a grounding base of Crushed Sage. The silicone-free, protein-free formula is Trichologist Approved, Stylist and Dermatologist Tested, vegan, color-safe, and suitable for chemically treated hair. Free of SLS/SLES, parabens, phthalates, phosphates, and MIC/MIT.