We've ordered these face coverings before and they are really comfortable. They are polyester on the outside and two payers of cotton on the inside. They press for sublimation beautifully and quite easily however these are great for vinyl application as well.
This is the only time we will be ordering them as it was a spur of the moment thing that we needed for one of our brides. Whatever is left has been placed in the inventory.
They come in 2 sizes
Large 5" x 7"
Small 4" x 6"
Sublimation pressing time should be 60 seconds at 400 degrees.