Joico Defy Damage Sleepover Overnight Treatment 3.38 oz — No-Rinse Strengthening with Arginine & Keratin

Joico Defy Damage Sleepover is an overnight, no-rinse treatment that strengthens weakened bonds while you sleep to leave hair softer, smoother, and more resilient by morning.

Designed for hair that needs repair without adding an extra step to your routine, this leave-in overnight treatment works throughout the night to fortify strands and reduce mechanical breakage. Formulated with arginine and keratin, it targets areas of weakness to improve manageability, shine, and the visible appearance of split ends. Apply before bed and wake up to hair that feels conditioned and easier to style—no rinse required.

How does this treatment work overnight to improve my hair?

The formula penetrates the hair surface while you sleep to support bond integrity and surface smoothness. Active ingredients such as arginine and keratin complement hair’s natural structure, helping edges and lengths resist combing breakage. Because it’s a leave-in product, the treatment stays in contact with hair long enough to deliver noticeable conditioning without weighing strands down.

• Arginine helps reinforce internal bond support for weakened sections.
• Hydrolyzed keratin fills and smooths cuticle irregularities.
• No-rinse delivery provides continuous overnight conditioning.
• Light formula avoids greasy residue, keeping hair manageable.

Will this reduce split ends and breakage I see from styling?

The treatment targets the look and feel of split ends and minimizes combing-induced breakage by strengthening vulnerable areas. While it won’t reverse existing splits, it improves strand pliability and surface condition to reduce further fraying and breakage during detangling and styling. Regular nightly use helps protect hair between salon services and styling sessions.

• Visibly reduces the appearance of split ends with conditioning agents.
• Increases resistance to combing breakage versus non-conditioning shampoo.
• Supports healthier-feeling hair that withstands daily styling better.

How do I use Joico Defy Damage Sleepover for best results?

Use on dry or damp hair before bed: apply a small amount to lengths and ends, focusing on damaged zones, then style or braid as usual. Do not rinse; allow the product to absorb overnight and style as desired in the morning. Frequency depends on damage level—use nightly for intensive support or a few times weekly for maintenance.

• Apply sparingly to mid-lengths and ends—avoid heavy roots.
• Leave in overnight; do not rinse out in the morning.
• Use nightly for best reinforcement, or as needed for upkeep.

Is this safe for color-treated or chemically processed hair?

The lightweight, bond-supporting formula is formulated to complement chemically treated and color-treated hair by improving manageability and shine without stripping color. Because it’s a leave-in no-rinse treatment, it helps protect fragile, processed strands between washes and salon treatments. Always perform a patch test if you’re concerned about sensitivities to topical products.

• Safe for use on colored and chemically treated hair types.
• Helps maintain shine and reduces surface roughness after processing.
• Non-rinse format preserves styling and color routines.

Who is this for: Joico Defy Damage Sleepover is ideal for anyone with dry, brittle, chemically processed, or frequently styled hair that needs overnight repair and improved manageability. It’s suited to people who want an effortless, no-rinse treatment to reduce breakage and enhance softness without changing their daytime styling routine. If you’re looking for a simple way to strengthen strands and wake up to smoother hair, this treatment provides targeted nightly support.

Ingredients

Water/Aqua/Eau, Dimethicone, Cetearyl Alcohol, Glyceryl Stearate SE, Phenyl Trimethicone, Phenoxyethanol, Behentrimonium Chloride, Simmondsia Chinensis (Jojoba) Seed Oil, Carthamus Tinctorius (Safflower) Seed Oil, Laurdimonium Hydroxypropyl Hydrolyzed Keratin, Moringa Oleifera Seed Oil, Arginine HCl, Phosphatidylcholine, Rosa Canina Fruit Oil, Avena Sativa (Oat) Peptide, Arginine, Steareth-2, Propylene Glycol, PEG-150/Decyl Alcohol/SMDI Copolymer, Crambe Abyssinica Seed Oil Phytosterol Esters, Polyquaternium-37, Dicaprylyl Carbonate, Sodium Gluconate, Glyceryl Laurate, C12-15 Alkyl Benzoate, PEG-90M, Citric Acid, Lauryl Glucoside, Dipropylene Glycol, C10-40 Isoalkylamidopropylethyldimonium Ethosulfate, Isopropyl Alcohol, Benzoic Acid, Sodium Benzoate, Tocopherol, Limonene, Linalool, Geraniol, Citronellol, Coumarin, Fragrance/Parfum.