I’m going on a cruise in a month and wondering how well the hair would tolerate in and out of the water? I think the pool on board is ocean water, but chlorination systems are used at times.

Honestly, that is a very difficult question to answer. Have I had this hair in on a cruise? Yes. Have I had it in things that aren't good for it? God yes. I would advise others to do so sparingly - braid it and try to keep it out of harsh chemical water as much as you can. Make sure you use solid care products, a good nylon bristle extension brush like the Spornette 21 for detangling and you should be great.