Necessary hair styling products for Europe

If you are staying in hotels, you probably won’t need a blowdryer. Most hotels provide one.

Which country are you visiting?

Even with dual voltage, in my experience, the ones I have brought have never worked, and have often been ruined. (Blower brush, curling irons, etc.)
Most hotels provide hair blowers. If the one in the room seems weak, go to the front desk, where they usually have "better" ones. Good luck!

If you're using AirBnB, you can filter your results for hair dryer. Also, if you end up somewhere that doesn't have one, you could buy one. They're not very expensive. Just leave it behind.

Almost all hotels have hairdryers. As others have mentioned, the front desk will have extras if there are any issues. Short-term rentals are a bit iffy. Last year, we stayed in an Airbnb in the Netherlands, and there was no hairdryer. I towel dried my hair for 5 nights. (My hair was a few inches beyond my shoulders at the time.) Now, I always make sure a hairdryer is mentioned in the amenities for an Airbnb. Definitely a lesson learned.

Agree with buying one. On a trip to France 20 years ago stopped at the BHV dept store near Notre Dame and the Hotel de Villa and purchased one..still going strong! Have taken it all over Europe (except the UK). Some hotels have weak airflow for my thick hair. Great investment!

We stay in moderate level accommodations. I have never been anywhere in Europe where there wasn't a hair dryer in the room or at the front desk.

You can email each hotel and ask if they have hair dryers in every room. I have found that most do, but asking ahead of packing is easy.