Real. IIRC from going through the catalogs yesterday, up until about 5 years ago Hermes pocket squares had been quite boring looking. Their new ones are much better and much more desirable (scarf like).
..a bit expensive those..
I bought two SP sport jackets, one cotton and one totally unstructured in cashmere. I paid less than 400 USD from an outlet in Switzerland, normal price around 2000 USD. I am not really that impressed and in my view these are not much better than some Piombo or Boglioli.
It's also true that this outlet has them at 80% or 90% off and only unusual colors/pattern (e.g. horse blankets). It might be my fault of seeing too much Sartoria Partenopea junk...