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Perfect hair Day (PhD)

night cap overnight perfector

SKU# R1005

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An easy-to-use weightless solution that provides up to one week of more shiny, vibrant, manageable hair overnight. Powered by our patented Healthy Hair Molecule (OFPMA) and time- release conditioners, Night Cap is the ultimate beauty sleep for your hair which delivers:

  • shiny hair for days 
  • leaves colour looking more vibrant
  • more manageable hair
  • overnight results that last (up to 5 shampoos)

Perfect hair Day (PhD) Night Cap is ideal for all hair types. It is pillow-safe and silicone-free. Safe and formulated for colour and chemically treated hair.


Wake up to beautiful, healthy looking hair. This fast-absorbing, pillow-safe formula is so genius, it works while you sleep.

Use before bed. Apply to damp or dry hair. Start with 2-3 pumps. Spread product between hands. Evenly distribute from root to tip, focusing on ends. Use more depending on hair thickness or length. Comb through and leave on overnight. Style or wash out in the morning.

Use as often as needed. Fast absorbing. Pillow safe.


How does Night Cap compliment other Living Proof treatments? How do I know which treatment is right for me?

It’s formulated to treat most hair types. Think of it as beauty sleep for your hair. If you have specific concerns:

  • If damage is your primary concern, use Restore Mask, Instant Protection or Instant Repair to undo the damage. Add Night Cap to help keep your hair looking healthy.
  • If frizz is a major concern, use No Frizz Leave-In Conditioner to help block humidity and fight frizz. Add Night Cap to help keep your hair looking  healthy.

Is Night Cap Keratin/Straightening treatment safe?

Night Cap is keratin and straightening treatment safe.  Keratin and straightening treatments are damaging to hair. Night Cap is a perfect product for anyone seeking to keep hair looking and feeling great, particularly after having a straightening treatment.

Night Cap is also sodium-chloride free so it will not affect the results of your treatment.

Will using a clarifying shampoo defeat the benefits of Night Cap?

Night Cap lasts through multiple shampoos, including when you use a clarifying shampoo. 

In general, we recommend not over-using clarifying cleansers, as they strip hair, adding to the cycle of damage.

When should I use Night Cap if I color my hair?

We recommend using Night Cap the evening after your color service at a salon.

If you color your hair at home, apply the color according the manufacturer’s directions. Then follow with Night Cap. 

If I use Night Cap the night before a color service or coloring my hair at home, will it affect my color?

No, it is formulated to not affect your color.  

Can Night Cap be used over any other serums or anti-breakage creams that are normally applied right after showering?

We recommend not applying Night Cap over a silicone or oil-based serum because they minimize the ability for Night Cap to soak into your hair. We recommend if you have a lot of styling product in your hair, to brush your hair to help remove any residue before applying Night Cap.

If you wash your hair in the evening, we recommend you apply Night Cap prior to any other stylers or leave-ins to ensure the greatest benefits from Night Cap. You may not find the additional stylers or leave-ins necessary on the nights you apply Night Cap.

Are the benefits different if you leave it in vs. rinse/shampoo it out the next morning?

The benefits will be the same regardless if you leave it in or rinse/shampoo it out of your hair the next morning. Night Cap’s benefits build over time so do whatever works best for your routine.

If I use Restore Instant Repair Cream, can I use Night Cap as well?

Yes, Restore Instant Repair Cream and Night Cap work well together to keep you hair its healthiest and split-end free.

When and why is it important for a product to be sulfate-free?

You've probably heard a lot about sulfates and generally think they are bad for hair. 

You should watch out for sulfates in Shampoos as when they are used in lathering, cleansing products they can strip hair of its natural surface oils making it feel rough, dry and brittle. Sulfates can also strip the scalp of its natural oils, leading to dryness and irritation.  Examples of commonly used sulfate ingredients that can be stripping include: Sodium Lauryl Sulfate, Sodium Laureth Sulfate, Ammonium Lauryl Sulfate, Sodium Laureth Sulfate.  You should watch out for these in shampoos.

Sulfates do not inflict damage on hair when used in conditioners or treatments.  When used in these products they actually help make hair smoother, softer and visibly healthier.

Sulfates in conditioners and treatments do not damage chemical treatments or color.  Characterizing them as not good for your hair in these types of products is incorrect. 


  • Independent Cosmetic Manufacturers and Distributors
    2015 Independent Cosmetic Manufacturers and Distributors, Cosmetic Innovatory of the Year (CITY) Award for Product Innovation, Haircare
  • Latina Magazine
    2015 Latina Magazine , Latina Magazine 2015 Beauty Awards, Perfect hair Day (PhD) Night Cap Overnight Perfector

love notes

Posted by Michelle on July 14, 2017

I am not one to write reviews, but I do feel this product deserves one. I have been using living proof products for about a year so far and fell in love. My hairdresser recommended me getting the night cap overnight perfector for the summer since I lightened my hair and the sun dries it out. Let me just say, OBSESSED with this product. Not only do I feel like I just walked out a salon, but the product lasts in my hair after washing it several times. I instantly saw a difference, my hair was super soft and shiny. I was even able to style and blow out my hair right after. So happy I found a product I can continuously buy throughout the year!!

Posted by Alexis Bo on January 20, 2017

This is the best hair product I ever used! I always struggled with dry and frizzy hair but with this NightCap, my hair feels like heaven! I use this as a leave-in conditionner and it's feels so lightweight, it's like I have nothing in my hair. You must try this if you have the same concerns than me, you won't regret it, I promise! Thank you Living Proof, now it's Perfect Hair Day everyday!

Great Product!
Posted by Allison on December 16, 2016

This is definitely one of my very favorite hair products. When I use it, my hair behaves sooo much better, styles better, feels softer and smoother. It's recommended to put in the night before, which works great, unless you are super tired, forget, or wake up the next morning and you HAVE to wash your hair. In that case, I put it on before I shower, put my hair in a pony tail and wait until the very last thing to rinse it out and wash it...still works great for fabulous hair. Love using this with PhD shampoo and conditioner, then follow with a little bit of Blowout just before styling with a blow dryer. I have 40-something's hair and it has helped return it to youthful looking hair!

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Perfect hair Day (PhD) collection

When the complete Perfect hair Day line is used together as a regimen, hair stays cleaner, longer. It looks and feels, well, perfect.

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