Anyone used a powder sunscreen?

[Wellhellothere1]

I'm thinking this may be the answer to the sunscreen re-application over make up problem. I'm using acid toners and tretinoin cream so I apply factor 50 under my make up most days. However today I was at sports day, it was very hot and sunny and I was worried the sunscreen I applied at 7am would be all gone a few hours later.
Anyone tried these powders and would recommend any?