Hiya Crystal,
Welcome to planDisney! A good night's rest is essential to any Walt Disney World Resort Vacation, especially if you are planning to be up and about from rope drop to park close.
In my experience, the sheets in the resort rooms are excellent! When I visited Walt Disney World Resort during the height of my pregnancy (feeling like I was running a million degrees), I stayed nice and cool each night during the 80-90 degree Orlando evenings. With that said, I can't recall if the sheets were 100% cotton. Luckily, a Cast Member in Guest Services was able to check on your question for me so that we could make sure your travel partner has the sweetest of dreams. We were able to confirm that the linens used at
Walt Disney World Resort Collection Hotels come from the Sobel at Home brand. According to their website, their sheets are 100% cotton, so I would plan for that.
I hope this was helpful, Crystal. I hope you and your travel partner have a magical vacation and the most enchanting dreams.
Happy Planning,
Ashley F.