This is a great basic set of sheets! The set includes a fitted and flat sheet, as well as two pillow cases. I' ve been sleeping on these for a little over a week and I have found them to be really comfortable and breathable. The fabric is kind of thin and almost floppy and very soft. This fits my queen size mattress very well and actually tucks under the corners just a little bit. I have not had any concerns for the corners popping or slipping up. I did wash and dry these on receipt and did not have any concerns about the fabric shrinking and not fitting my mattress