Joico Defy Damage Sleepover overnight hair treatment, 3.38 oz — no-rinse, strengthens & smooths

Joico Defy Damage Sleepover is an overnight, no-rinse bonding treatment that nourishes and strengthens hair while you sleep for softer, smoother strands by morning.

Designed to work during your bedtime routine, this lightweight, leave-in formula targets weakened bonds and surface roughness without weighing hair down. Infused with arginine and keratin-derived ingredients, it aims to reduce the look of split ends, improve manageability, and add shine so hair feels healthier when you style it the next day.

How does this overnight treatment strengthen hair while I sleep?

Defy Damage Sleepover uses bond-supporting actives that work on stressed areas of the fiber overnight, when friction and heat from daytime styling aren’t affecting hair. The formula absorbs into the cortex and cuticle to temporarily reinforce strand integrity and help limit combing breakage.

• Contains arginine to support surface conditioning and strand resilience
• Keratin-derived ingredients help smooth the cuticle for less friction
• No-rinse texture leaves treatment in place through the night

Will it make my hair feel softer and less frizzy by morning?

Yes — the formulation is designed to leave hair instantly softer and smoother without oily residue. Overnight absorption targets dry, rough areas so you wake up with improved texture that’s easier to detangle and style.

• Instant softening for easier comb-through in the morning
• Smoothing agents reduce surface roughness and frizz
• Lightweight finish keeps hair from feeling weighed down

How does this product help with split ends and breakage?

The treatment minimizes the visible appearance of split ends and reduces combing-related breakage by reinforcing vulnerable fiber bonds and smoothing damaged cuticle layers. It won’t repair already severed strands, but it helps protect and improve the look of hair between trims.

• Reduces the appearance of split ends with protective conditioning
• Strengthens bonds to limit breakage from brushing and styling
• Best used regularly as a preventive and restorative step

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

Apply to dry or damp hair before bed, focusing on mid-lengths to ends, then leave in overnight—no rinsing necessary. In the morning, style as usual; continued, consistent use provides the most noticeable smoothing and strengthening benefits.

• Use a small amount on mid-lengths and ends — avoid the roots for fine hair
• Leave in overnight; do not rinse out
• Incorporate into weekly or nightly routine based on hair condition

Who this product is for: Joico Defy Damage Sleepover is ideal for anyone with damaged, dry, chemically treated, or heat-stressed hair seeking an easy overnight step to improve softness, reduce the look of split ends, and boost manageability. It suits those who prefer a leave-in solution to strengthen strands between salon visits and wake up with smoother, more workable hair.

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.