Usually I buy only 100 percent cotton but thaws said "cotton rich" and I failed to notice they are a cotton and polyester blend. Once I saw them I was happy I ordered them. They are well made, very soft, and I couldn't tell them from way more expensive sheets. And the bottom fitted sheet easily covered the deep mattress sides. The stone color is a wonderful true stone color and pairs perfectly with the navy plaid Eddie Bauer comforter I selected.  Very good feel and look for a fraction of what you'd expect to pay.