Hi DREAMGIRLY,
As you know I think you made a great quality/value choice … and congratulations on your new mattress 
I’m looking forward to your comments and feedback once you receive it and have had the chance to sleep on it for a bit.
There is more about the pros and cons of different types of mattress protectors and some examples of each of them in post #89 here that should be helpful.
The most common choice would probably be one of the “thin membrane” types of protectors because they are mostly waterproof and have little effect on the feel and contouring of the mattress but there are a few people that use them that find that they sleep a little bit warmer because the membrane is only “semi breathable”. The wool quilted protectors without a membrane would be more temperature regulating but they are more water resistant than waterproof but “water resistant” may be good enough for you depending on the chance of an accident. The wool quilted protectors with a membrane would be more waterproof but wouldn’t be as temperature regulating as the ones without the membrane but because of the wool would be more temperature regulating than the thinner membrane type of protector without the wool. Thicker protectors will also have more of an effect on the feel of the mattress as well.
Phoenix