Genesis Défense Thermique by Kérastase

Kérastase Genesis Défense Thermique Leave-In Heat Protectant

A lightweight, leave-in heat protectant that shields weakened, breakage-prone hair from heat damage while fortifying the fibre. Genesis Défense Thermique protects up to 230°C — so you can blow-dry and style with confidence, knowing your hair is getting stronger, not weaker.

Who It’s For

For weakened, fragile, or breakage-prone hair that is regularly exposed to heat styling. Ideal for anyone who blow-dries, straightens, or curls their hair and wants to protect and strengthen at the same time.

What It Does

• Protects against heat damage up to 230°C
• Strengthens and fortifies the hair fibre
• Reduces breakage caused by heat styling
• Smooths and softens for easier styling
• Lightweight leave-in — no rinsing required

Why You’ll Love It

Because heat styling and hair health don’t have to be at odds. This protectant lets you style freely while actively strengthening your hair — so every blow-dry becomes part of your repair routine, not a setback.

How to Use

1. Apply to towel-dried hair before heat styling
2. Work through mid-lengths and ends
3. Do not rinse
4. Blow-dry, straighten, or curl as desired

When to Use

Use before every heat styling session as part of your Genesis strengthening routine.

Key Ingredients

• Edelweiss Native Cells — Protect the hair fibre from heat and breakage
• Ginger Root — Strengthens hair at the root
• Aminexil — Anchors the fibre and reduces shedding
• Heat-Shield Technology — Protects against thermal damage up to 230°C

Fragrance

A fresh, clean scent with notes of citrus, soft botanicals, and warm musk — light, energizing, and beautifully refined.

Why We Love It

Because it makes heat styling guilt-free. Protect, strengthen, and style in one step — your hair will thank you for it. Available in Alberta at Denim & Smith Barbershops.