Is soap shampoo and a hair dryer available?
Many casas have basic sanitary facilities. Such as toilet paper and soap. However, it can be difficult to find a hair dryer, deodorant or even shampoo. Keep in mind that this type of product is seen as luxury in Cuba. And if they are already available that they are very expensive in Cuba.
I therefore recommend that you take everything you need in your toilet bag. For hair, mouth and further personal care. As well as a small medical kit with aspirin, plasters, diarrhea inhibitors and condoms.
In the sunny climate of Cuba you could consider letting your hair dry in the sun and leaving the hair dryer at home. By the way, most casas do not have 220 volts but only 110 volts.