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Bottle of kérastase genesis defense thermique fortifying blow-dry fluid for hair.
an image of the genesis ingredients
Genesis - Défense Thermique - 150ml - Image 3
Genesis - Défense Thermique - 150ml - Image 4

Kérastase

Genesis – Défense Thermique – 150ml

Anti Hair-Fall Blow-Dry Fluid - Protection For Weakened Hair

(31 customer reviews)

$65.00

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Blow dryers, flat irons, and curlers don’t have to be the enemy! Kérastase Genesis Défense Thermique helps you style safely, this light-weight leave-in spray that shields fragile, fall-prone hair from heat styling up to 220°C (428°F), while providing hydration and anti-breakage support. Formulated with strengthening and softening ingredients, this light-weight spray smooths frizz, detangles, and helps reduce shedding from brushing and styling, making it the perfect daily companion for anyone experiencing stress-related or lifestyle-triggered hair fall.

Who It’s Great For: 

  • Fine to medium hair that breaks easily
  • Anyone who heats styles regularly (even occasionally!)
  • Hair that tangles easily or sheds when brushing
  • Stressed, weakened hair from lifestyle factors
  • All hair textures are experiencing fall due to breakage

Why You’ll Love It:

  • Protects against heat damage up to 220°C (428°F)
  • Reinforces weakened fibres to help prevent breakage
  • Hydrates and softens without heaviness
  • Smooths frizz and eases detangling
  • Ideal for use before blow-drying, straightening, or curling

Key Ingredients

  • Ginger Root – Known for its protective, stimulating properties for scalp and hair health
  • Edelweiss Native Cells – Rich in antioxidants, helps reduce fibre stiffness and restore flexibility

Pomme Pro Tip:

Even if you’re not heat styling, this is a great daily leave-in to detangle (with your Pomme Brush) and smooth, especially for hair that tangles easily or tends to shed when brushing! 

Product Highlights

  • Thin/Fine Hair
  • Frizz Control
  • Kérastase Full-Size
  • Squad Picks
    1. Apply 2–4 pumps to towel-dried hair, mid-lengths to ends.

    2. Comb through with your Pomme Brush (sold separately) to distribute evenly.

    3. Proceed with blow-drying or heat styling. No rinsing necessary.

  • Aqua/ Water/ Eau/ Cocos Nucifera Oil/ Coconut Oil/ Amodimethicone/ Polyquaternium-37/ Phenoxyethanol/ Propylene Glycol Dicaprylate/ Dicaprate/ Xylitylglucoside/ Sodium Hydroxide/ Anhydroxylitol/ Xylitol/ Dimethicone Peg-7 Phosphate/ Ppg-1 Trideceth-6/ Trideceth-6/ Behentrimonium Chloride/ Limonene/ Xylose/ Ethylhexylglycerin/ Sorbitan Oleate/ Linalool/ Isopropyl Alcohol/ Cetrimonium Chloride/ Glycerin/ Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol/ Benzyl Salicylate/ Coumarin/ Zingiber Officinale Root Extract/ Ginger Root Extract/ Citral/ Benzyl Alcohol/ Citronellol/ Benzyl Benzoate/ Leontopodium Alpinum Callus Culture Extract/ Potassium Sorbate/ Tocopherol/ Citric Acid/ Xanthan Gum/ Dipeptide Diaminobutyroyl Benzylamide Diacetate/ Parfum/ Fragrance

  • Q: What does this product do?
    Defense Thermique is a heat-protecting leave-in treatment that hydrates, reinforces and protects hair from heat up to 220°C (428°F), while reducing the risk of hair-fall due to breakage. It also detangles hair and provides frizz control.

    Q: What hair types is this suitable for?
    This product is specifically designed for weakened hair that's prone to falling due to breakage from brushing or styling. It's ideal if you regularly use heat styling tools.

    Q: How do I use it?
    Apply to towel-dried hair before blow-drying or heat styling. *Spray a minimum of 2 pumps throughout your hair and distribute evenly through lengths and ends, then style as usual. *The number of pumps will vary depending on your hair type and thickness. 

    Q: What temperature protection does it provide?
    The formula protects hair from heat up to 220°C (428°F), making it suitable for most blow dryers, flat irons, and curling tools.

    Q: What are the key ingredients?
    The formula is enriched with Edelweiss Native Cells and Ginger Root, which work together to strengthen and protect the hair fibre.

    Q: Will this make my hair greasy or weigh it down?
    No, the lightweight formula provides hydration without frizz, Genesis Défense Thermique - Anti Hair Fall Serum - Kérastase, and leaves hair shiny and soft with a silky touch.

    Q: Can I use this on dry hair?
    For best results, apply to towel-dried hair before styling. This allows the product to properly protect and prepare your hair for heat styling.

    Q: How often can I use this?
    You can use this daily or whenever you plan to use heat styling tools. It's designed for regular use as part of your styling routine.

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