Joico Defy Damage Sleep Over Overnight Treatment
- Overnight leave-in treatment, no rinse
- Bond strengthening against combing breakage
- Split end appearance reduced
- Softens and smooths hair
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
An overnight leave-in for damaged hair that strengthens bonds and softens while you sleep. The listing gives no ingredients or directions, so first-time users have to guess the amount.
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ASIN: B08YMH2JZKCategory: Hair Masks
Overview
A bond-strengthening formula does the work in Joico Defy Damage Sleep Over, applied before bed and left in overnight. It nourishes damaged hair, reduces the look of split ends and leaves strands softer by morning.
Treating hair during sleep adds no time to the morning routine, and it targets breakage from combing. The page is very short, with no ingredient list, no hair type guidance and no usage steps.
Who it's for
Bleached, heat-styled or otherwise damaged hair that snaps when combed is the target. People with healthy hair or a sensitive scalp who need ingredient details should pass on this listing.
Pros and cons
- Works overnight, no rinse
- Strengthens bonds against breakage
- Reduces look of split ends
- Softens and smooths hair
- Ingredients not listed
- No directions given
- Hair type guidance missing
Performance notes
Results build from contact time: left on through the night, the treatment has hours to condition and reinforce the hair before it is washed or styled. How much is applied matters, since too much leave-in can leave hair limp.
Specifications
| Brand | Joico |
|---|
Frequently asked questions
What size is the Joico Defy Damage Sleep Over?
The bullets and specs do not state a size, so check the size shown in the listing title.
Is Joico Sleep Over a shampoo or conditioner?
Neither. It is an overnight nourishing leave-in treatment.