Hi 901-Memphis,
You can see some comments about Winkbeds and many of the other “simplified choice” mattresses in post #2 here in the simplified choice mattress topic and a forum search on winkbed (you can just click the link) will bring up more comments and feedback about them as well. I would be very cautious because the quality/density of the materials don’t meet the minimum quality/durability guidelines that I would suggest for someone in your weight range.
There is more information 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.
Phoenix