Hi there, Brenda, and welcome to planDisney! It's always a good day when I get to help a fellow Virginian with their Disney questions.
I just got home yesterday from an amazing stay at
Disney's Coronado Springs Resort, and I agree with you that the mattresses there are so, SO comfortable. In fact, another Guest asked the same question and I was able to pull the sheets back and find the tag. This was in the Gran Destino Tower, but my understanding is that the mattresses are consistent across the resort. The mattress in my room was a Sealy innerspring unit pillow-top, model number 514874. The tag reads "Queen 7682 0030" and it noted that the mattress measured 60 x 79 inches. My good friend and fellow panelist
Eean tracked down some additional information in 2019, which she shared in this answer.
I checked the pillows too, and they are Sobel Westex brand. It appears they use different types in the rooms at Walt Disney World Resort. I have the Sahara Nights pillow, which I purchased after discovering them at Disney's Grand Floridian Resort & Spa, and I love them! In my Gran Destino Tower room, we had Sobella Suprema pillows, and they were also very comfortable. It seems they may circulate the pillows after laundering, so I can't guarantee which pillow you had during your stay.
I hope this information helps you replicate that excellent night of sleep, Brenda! Between all the walking and excitement, I always sleep like Princess Aurora on our Walt Disney World Resort vacations!
Wishing you sweet Disney dreams,
Robyn