These sheets are luxurious and have true deep pockets. I have 18" pocket mattress and difficult to find that size that fits after washing with the elastic holding up. These sheets at 20" pockets give "ample" room for my mattress. The quality is tremendous. 800 threat was perfect for me because of the weight. After several washings, elastic is strong and the sheet as nice as it was brand new. They do wrinkle but are nice to sleep in anyway. They are made in the USA with a high degree of quality. I will buy more for my other beds.