Keep Your Hair Beautiful in the Sea or Pool! The Latest Techniques to Protect Your Hair While Swimming

0. Why "Hair Care for Swimming Days" is Necessary—Visualizing Five Damage Factors

• Chlorine & Copper Ions: Pool water may contain disinfectant chlorine and copper compounds like copper sulfate to prevent algae, which can dry and discolor (turn green) the hair.ScienceAlertThe Times of India
  
  

• Salt & UV Rays from Seawater: Salt promotes dehydration, and UV rays accelerate cuticle damage and pigment fading.PADI BlogPeople.com
  
  

• pH Fluctuations: Deviating significantly from the ideal hair pH of 4.5-5.5 can open the cuticles, causing tangling, dryness, and color fading.ENORE
  
  

• Friction & Tension: Wet hair swells and weakens, making it prone to breakage from towel drying or friction from goggles/caps.Vogue株式会社ALHIA
  
  

• Over-Cleansing & Heat Damage: Excessive use of alkaline shampoos or high-heat dryers to remove chlorine can be counterproductive.ClinikallyPeople.com

1. PRE: The "Saturation & Coating" Strategy Makes a Difference 10-30 Minutes Before Entering Water

1-1 "Pre-fill" Hair with Fresh Water

Dry hair acts like a sponge. Saturating it with fresh water significantly reduces the amount of chlorine or seawater that can penetrate.The Times of IndiaAmanda Moncur Salon

1-2 Create a Protective Layer with Leave-in or Plant Oils

Hydrophobic oils such as argan, coconut, or jojoba, or silicone-based leave-ins form a thin film on the hair surface, reducing friction.PADI BlogVogueVogue

1-3 Physical Barrier: Silicone Swim Cap + Braiding

A snug-fitting silicone cap minimizes chlorine contact. For long hair, braiding or twisting reduces surface area.Super Million Hair for Thinning Hair -Wikipedia株式会社ALHIA

2. DURING: "Small Tricks" You Can Do While Swimming

• If Swimming for Long Periods, Lightly Rinse with Fresh Water Midway: In outdoor pools or the sea, shower off salt and chlorine.Scalp International HairlinesClinikally

• UV Protection for Scalp with Hats or Bandanas (Sea & Beach): Scalp sunburn increases the risk of thinning hair. Use a UV stick to protect partings.People.comGlamour

3. POST: "Reset & Intensive Repair" from Immediately After Swimming to 24 Hours Later

3-1 First, "Rinse Immediately"

Chlorine, copper, and salt expand oxidative damage over time. Rinse off if possible, even before going home.The Times of India株式会社ALHIA

3-2 Smart Use of Chelating or Clarifying Shampoo

Use shampoos with chelating agents like EDTA or "swimmer's shampoo" to remove metal ions. However, they are too strong for daily use, so limit to 1-2 times a week.ClinikallyVogue

3-3 Weak Acidic Shampoo → High Moisture Mask to Restore pH and Moisture

For daily use, choose a weak acidic shampoo with a pH of 4.5-5.5. On weekends, use a deep mask and steam towel for enhanced absorption.ENORE株式会社ALHIA

3-4 "Press Dry" with Microfiber Towel/T-Shirt

Press to absorb moisture without rubbing. Minimize friction damage to cuticles.VogueTikTok

3-5 Use a Hair Dryer on Low Heat + Distance + Short Time

Leaving hair wet can cause mildew smell and scalp issues. Dry mainly at the roots with low heat, finishing with cool air to close cuticles.People.comClinikally

4. Why Does Hair Turn "Green"? It's Not Chlorine, But "Copper"

Copper ions bind with hair proteins, causing green discoloration. Blondes and light-colored hair are more prone to this. The solution is "chelating removal" and "pre-oiling."ScienceAlertThe Times of India

5. Customization Based on Hair Type and History

5-1 Colored/Bleached Hair

• UV rays and metal ions accelerate fading. Use UV protection spray and acidic treatments to retain pigments.People.com株式会社ALHIA

5-2 Curly Hair/After Straightening

• Moisture balance is easily disrupted, so focus on weak acidity, high moisture, and friction reduction.