I've been using this powder for about a year now and yet I STILL can't get the name right first time, even when reading it off the jar. Hyaluronic Hydra Powder is a stupid name anyway, it sounds like something from an Avengers movie.
It doesn't unfortunately give me any special hydra powers, but it does do a pretty good job of keeping my foundation in place which is all I ask really. It's a really fine powder (so heads up, you will accidentally breathe it in through your nose, a lot) which looks a lot like talcum powder, but goes on transparent so don't worry you won't end up looking like Caspar.
I feel like it's lasting forever as I only use a small amount each time. So even though it's pretty pricey at £42, it's been good value for money. I don't have much else to say really - it does the job of keeping my skin shine free and setting my foundation in place without it looking too cakey or flat. I'm not sure if it's one I'll repurchase as I like trying new products so will probably give something else a go next, but if you're looking to try a new powder then it's worth a look!