What's the best heat protector spray?

[Chochito]

I never heat style my hair but now I've had it cut to a bob I am experimenting with ghd waves sometimes (I'm still crap!) My hair is highlighted (half head every 3-4 months), straight and fine but quite a lot of it. Which is the best product to use for protection when heat styling?

I've just been using this, it's a good product and covers a few bases including heat protection. It's great at detangling too.
https://www.amazon.co.uk/dp/B00M9B66BU/ref=cmswwrcpptai_.eF.EbREDTW0C

Lee Stafford poker straight flat iron spray. I’ve used it 15 years.

Thank you! Do these types of products dry out your hair?