Hi rbarnett,
Yes … it makes sense to me.
When you can’t test a mattress in person then the most reliable source of guidance is always a more detailed phone conversation with a knowledgeable and experienced retailer or manufacturer that has your best interests at heart (which would certainly include SleepEZ) and who can help “talk you through” the specifics of their mattresses and the properties and “feel” of the materials they are using (fast or slow response, resilience, firmness etc) and the options they have available that may be the best “match” for you based on the information you provide them, any local testing you have done or mattresses you have slept on and liked or other mattresses you are considering that they are familiar with, and the “averages” of other customers that are similar to you. They will know more about “matching” their specific mattress designs and firmness levels to different body types, sleeping positions, and preferences (or to other mattresses that they are familiar with) than anyone else.
You’ve probably seen this already but there is more about the pros and cons of the different types of mattress protectors and some examples of each of them in post #89 here.
One of the thin membrane protectors would certainly be a good choice if “waterproof” is an important criteria and they certainly won’t harm the latex.
Most importantly … congratulations on your new mattress
You certainly made a great quality/value choice and I’m looking forward to your comments and feedback once you’ve received it and have had the chance to sleep on it for a bit.
Phoenix