What can I say, love these sheets. Very soft and smooth. We also got an embroidered duvet cover that apparently is made out of the same material.
I think these are a great cross between percale and a sateen sheet. They are a percale with a percale's durability but have some of the softness of a sateen sheet. We like to mix colors together with them so we have a number of the items and all have held up beautifully.
I have used Celeste sheets for years and I love the cool crisp feel and they are very durable.