Nexxus Curl Define Leave-In Conditioner for Curly & Coily Hair, 8 oz – ProteinFusion, Lightweight Frizz Control

Nexxus Curl Define Leave-in Conditioner is a protein-enriched leave-in cream that hydrates, controls frizz, and helps define curly and coily hair with a ProteinFusion blend of silk protein and marula oil.

Designed for curls that need targeted moisture and support, this lightweight leave-in absorbs quickly to seal in hydration and enhance curl shape without weighing hair down. Formulated from Nexxus's ProteinFusion research, the product aims to replenish the specific proteins curly hair loses, helping strands feel softer and look more defined when used alone or as part of the Curl Define system.

How does this leave-in conditioner improve curl definition?

The formula uses silk protein to smooth the hair surface and marula oil to add slip and moisture, which together help individual curls clump and form more consistent shapes. Applied to damp hair, the cream reduces flyaways and sets curl pattern for longer-lasting definition.

• Silk protein smooths cuticle for clearer curl formation
• Marula oil adds hydration and reduces frizz
• Lightweight cream avoids heavy buildup on curls

Will it help dry or damaged curly hair feel stronger?

Nexxus uses Proteomics research to identify proteins important for curly hair, and the ProteinFusion blend replenishes some of those building blocks. Regular use within the Curl Define range supports improved manageability and a softer feel, though results depend on overall hair condition and routine.

• ProteinFusion targets protein needs specific to curly hair
• Formulated to preserve essential hair proteins during styling
• Best results when paired with Curl Define shampoo and conditioner

How should I use it in my curl routine for best results?

Apply the leave-in to clean, towel-dried hair from mid-lengths to ends, then style as usual. It works well for finger coiling, diffuser drying, or air-drying and layers easily under gels or creams for hold without stiffness.

• Use after Curl Define Moisturizing Conditioner or mask on damp hair
• Start with a small amount; add more to thicker or drier sections
• Can be combined with styling gel for enhanced hold and frizz control

Is this suitable for all curl and coil types?

The leave-in is formulated for a wide range of curly and coily textures, offering moisture and protein balance without harsh sulfates. It’s intended to strengthen and define, but very fine curls should use sparingly to avoid any potential heaviness.

• Works on loose curls through tight coils when used appropriately
• Sulfate-free system options available in the Curl Define line
• Adjust quantity based on hair thickness and porosity

Who is this for: Nexxus Curl Define Leave-in Conditioner is for anyone with curly or coily hair seeking a salon-quality leave-in that blends protein support and moisture to reduce frizz and enhance curl shape. It’s especially helpful for users following a multi-step curl regimen who want targeted protein infusion plus lightweight hydration. If your hair responds well to protein and needs help with definition and softness, this leave-in can fit into daily or weekly styling routines.

Ingredients

INGREDIENTS/INGRÉDIENTS: WATER (EAU), CETEARYL ALCOHOL, DIMETHICONE, STEARAMIDOPROPYL DIMETHYLAMINE, SCLEROCARYA BIRREA SEED OIL, HYDROLYZED SILK, RICINUS COMMUNIS (CASTOR) SEED OIL, BUTYROSPERMUM PARKII (SHEA) BUTTER, HYDROLYZED KERATIN, HYDROLYZED WHEAT PROTEIN, GLYCERIN, BEHENTRIMONIUM CHLORIDE, FRAGRANCE (PARFUM), COCOS NUCIFERA (COCONUT) OIL, PHENOXYETHANOL, DIPROPYLENE GLYCOL, LACTIC ACID, CAPRYLYL GLYCOL, PETROLATUM, SODIUM CHLORIDE, AMODIMETHICONE, VP/DIMETHYLAMINOETHYLMETHACRYLATE COPOLYMER, DISODIUM EDTA, CETRIMONIUM CHLORIDE, PEG-7 PROPYLHEPTYL ETHER, BENZYL ALCOHOL, BENZYL SALICYLATE, COUMARIN, EUGENOL, GERANIOL, HEXYL CINNAMAL, LIMONENE, LINALOOL.