I think that the product page was very clear that these are not all cotton sheets. That being said, I was skeptical of poly blend sheets. I love the feel of a nice thick weave cotton, but most of the reviews for these were excellent. I am so glad I tried them out. They don't feel like 100% cotton, but they feel better in my opinion. The poly keeps them wrinkle free (awesome!) and it also keeps my sheets nice and cool. Also, my sheets have that freshly washed "crispness" all the time, not just the first night or two after I wash the sheets. These sheets are comfortable, easy to care for, and look great. What more can I ask for?