There is a particular theory about why French women\’s hair survives the summer looking better than everyone else\’s. The theory attributes it to some genetic advantage, some proprietary product, some Parisian je ne sais quoi that can\’t be replicated. The theory is wrong.
What\’s actually happening is straightforward: French women, on average, apply SPF to their hair before sun exposure, use a less aggressive shampoo routine (less frequent washing, cooler water), condition deeply and consistently, and know how to work with what the heat does to their hair rather than fighting it. None of these are cultural secrets — they\’re accessible habits that require only a small shift in how you approach your hair in the warmer months.
Here\’s the complete summer hair protocol.
The Problem, Specifically
Sun, salt, and chlorine each damage hair differently:
Sun (UV exposure) breaks down melanin — the pigment that gives hair its color — and oxidizes the protein structure of the hair shaft. Color-treated hair fades faster; natural hair becomes progressively more porous and prone to frizz.
Salt water dehydrates the hair shaft and causes protein bonds to break down, leaving hair rougher in texture.
Chlorine is the most chemically aggressive: it strips natural oils, oxidizes color, and causes significant dryness in repeated exposure.
The compounding effect of all three — a beach vacation where you swim in the ocean, dry in the sun, and occasionally pool-hop — produces the kind of damage that takes months to recover from if you\’re not protecting against it.
The Prevention Protocol
Step 1: SPF for Hair
Yes, SPF for hair exists, and yes, it works. A UV-protective hair product — typically a spray, serum, or oil — applied before sun exposure does for your hair what sunscreen does for your skin: it absorbs or reflects UV radiation before it reaches the hair shaft.
Moroccanoil Protect & Prevent Spray SPF 25 — $26
The standard reference in this category. Spray it onto dry or damp hair before going outdoors. It also controls frizz and adds shine.
Shop Moroccanoil
Bumble and bumble Hairdresser\’s Invisible Oil Heat/UV Protective Primer — $34
A lightweight oil that protects against both UV and heat styling. Works especially well on fine hair that can\’t handle heavier protective products.
Shop Bumble and bumble at Sephora
Sun Bum Revitalizing Argan Oil Hair Formula with SPF 30 — $15
The most affordable effective option. The argan oil adds conditioning while the SPF protects. Available at most drugstores.
Shop Sun Bum at ASOS
Step 2: Post-Swim Rinse
After ocean swimming: rinse the hair with fresh water as soon as possible to remove the salt. Salt dries out the hair shaft rapidly — the longer it sits, the more dehydration occurs.
After pool swimming: a chelating shampoo (one specifically formulated to remove mineral and chlorine buildup) used once a week maintains hair health for regular swimmers. Redken Acidic Bonding Concentrate Sulfate-Free Shampoo ($30 at Sephora) functions as a gentle chelating option without stripping.
Step 3: Deep Conditioning
One deep conditioning treatment per week is the single most impactful intervention for summer hair health. The treatment doesn\’t need to be expensive — it needs to stay on the hair for long enough to penetrate the shaft.
Olaplex No. 3 Hair Perfector — $30
The cult product that has genuine evidence behind it. The bis-aminopropyl diglycol dimaleate formula repairs broken disulfide bonds in the hair — the specific bonds that UV, heat, and chemical damage break. Apply to clean damp hair, leave for at least ten minutes, then rinse and condition normally.
Shop Olaplex at Sephora
Briogeo Don\’t Despair, Repair! Deep Conditioning Mask — $38
The best option for very damaged hair — the formula is rich enough to provide significant moisture restoration in a single application.
Shop Briogeo at Sephora
SheaMoisture Manuka Honey & Mafura Oil Intensive Hydration Masque — $14
The best affordable option, and particularly good for naturally textured and coily hair types. The honey and oil combination provides genuine moisture without heaviness.
Shop SheaMoisture at ASOS
The Washing Routine
Wash less frequently in the summer than in winter. This runs counter to the instinct (you\’re sweating more, you feel like you should wash more), but the scalp\’s natural oils are also its primary natural protection. Stripping them too frequently leaves the hair more vulnerable to environmental damage.
When you do wash: use lukewarm water rather than hot (hot water opens the hair cuticle, causing more frizz and moisture loss), and finish with a cool rinse (which closes the cuticle and adds shine).
Protective Styling
The summer is the ideal time to embrace styles that keep hair off the face and neck, reduce heat styling, and minimize mechanical damage:
– A loose bun or low chignon protects the ends (the most damaged part of the hair)
– Braids, especially loose braids, reduce tangling and allow the hair to retain moisture
– A silk or satin scrunchie rather than elastic — elastic causes breakage at the point of tension
The specific styles matter less than the principle: less heat styling, less manipulation, more time with the hair protected from direct sun.
The One Product Worth Prioritizing
If you\’re going to add one thing to your summer routine: a UV hair spray applied before any outdoor time. The prevention is substantially easier than the recovery. Ten seconds of application before you leave the house saves months of damage restoration.
French women didn\’t discover a secret. They just decided their hair was worth protecting.
*Jade Park is Jebae\’s Beauty & Skincare Editor, based in New York. She trained as an esthetician in Paris and has strong opinions about SPF — for skin and for hair.*
