Genesis - Défense Thermique

The best heat protecting spray!

[I received this product in exchange for my honest review] I am obsessed with this heat protecting spray! I used it before blow drying and curling my hair and my hair feels so soft. Not only that, but it smells so good! It is very easy to apply and the size of the bottle is great.

Smells delicious and protects weakened hair

I received this product in exchange for my honest review. In the early 2000s when flat irons and other heat styling tools were used practically every day my hair was in embarrassingly poor condition. That kept me away from any heat styling tools until very recent years, when products to protect hair from the effects of this type of tool came into vogue. Not all of them that I have tried are great, but this one really impressed me.. Firstly, it’s non-sticky. Also, I love the scent. But most importantly it’s made specifically for hair that is weakened, such as my highlighted tresses. It works very well and I will continue to buy it. Now I’m not afraid to blow dry, so I have more styling options beyond just letting my hair air dry.

A good hair protector for damaged hair.

[I received this product in exchange for my honest review] I always look for the next best. Being a bleach blonde, I need a good heat protector. This is it! It's light weight but very effective. Hair feels smooth after use. Light scent. I don't have to use as much as others to get the same coverage. It doesn't weight my hair down either. The packaging is nice and gives just enough amount. Highly recommend!

I’m not usually one to bother with heat protectants and that always made me feel guilty. Most heat protectants feel heavy, sticky, or make my hair fall flat. This one is different. It’s super lightweight and somehow hydrates my hair and still leaves it bouncy. I LOVE the smell, and after a blowout my hair looks smoother with a nice, natural shine. It’s not cheap, but it actually does what I’ve always wanted a heat protectant to do. You get the best of the best.

In typical Kérastase style, this is a win. I have fine blonde hair that is quite fragile and this is amazing for blow drying. It smells fresh without being overpowering and a little goes a long way. I use it with the Genesis conditioner as well.

Great smelling and effective for heat treatment

[I received this product in exchange for my honest review] Smells great, bottle is sleek, the spray is nice, the scent is FANTASTIC, it did a good job at coating my hair and protecting it, there is a slight stickiness to my hair.

For anyone wanting to strengthen fragile hair

[I received this product in exchange for my honest review] Kérastase Genesis Défense Thermique is a fantastic heat protectant that makes my hair soft and smooth. Its lightweight texture keeps my fine hair feeling free and never weighed down. The fresh, luxurious scent reminds me of a high-end salon. Since using it, I've noticed less hair breakage and fewer strands falling out when brushing. It simplifies blow-drying and adds brilliant shine while protecting against heat up to 220°C. My ends look healthier and less frizzy. It absorbs quickly without any greasy residue, and there's no rinse step required. This product is essential for anyone wanting to strengthen fragile hair.

Would recommend

[I received this product in exchange for my honest review] Wow, I am impressed by how well this takes frizz without being too hard or oily. It’s compact and has simple pink spray packaging. The ingredients are not overly natural but very much do the job. The scent is pleasant.

Shiny & Smooth Hair!

[I received this product in exchange for my honest review] This Kerastase heat protection spray is a 10/10! After I blow dry and straighten my bleached hair, this product leaves my hair feeling super soft and a wonderful shine. It smells amazing too!

I love it!

[I received this product in exchange for my honest review] It smells very good and has nice sleek packaging. I say it is so effective that it is absolutely worth the price. Also no bad damaging ingredients like other heat protectants have.

Lightweight and helps with frizz!

[I received this product in exchange for my honest review] This is a lightweight, heat-protectant spray that leaves hair smooth, shiny, and less prone to breakage. Helps control frizz—perfect for daily styling!

New addition to my blowdrying routine!!

[I received this product in exchange for my honest review] This heat protecting spray left my hair feeling so hydrated and shiny! Love the fragrance! Does not leave hair feeling sticky or yucky! Also does not cause extra drying time which is great! This will definitely be a new addition to my blowdrying routine!