UPDATE: This is my second purchase of these sheets (white ones). My first order was in March of 2017 - I have an Airbnb and the first set I put into rotation with a set from a different company. These were washed, dried and used on average three times per week up until a week ago. That's 19 months of being washed, dried and used at least a dozen times each month (288 times through the washer and dryer for each set in the rotation). So these are good quality sheets, 100% cotton, thick, and have deep enough pockets for any mattress on the market. I did note that the sheets in this most recent order were a bit different - they have a thicker, better sewn elastic border on the fitted sheet and the pillow cases are longer.I don't like giving 5-Star reviews unless the product deserves it, and these deserve it. First, they do fit a really deep mattress, and they fit without having to pull and stretch. They are not wrinkle free, but if you take them out of the dryer immediately, then fold them, they are close enough to wrinkle free. They are soft, but "crisp" and I really like that about them - they also have a weight to them that "says" quality. The only, and this is a tiny, nitpicking thing, I can say sort of negative, is that the pillow cases could be just a little bigger/longer. Anyway, wash them in cold water, dry them on low, and these will last forever!