I managed to snag these SUPERIOR sheets on a lightening deal along with another brand sheet (CKG) with long-staple cotton in a slightly higher thread count. These felt softer and had a nicer sateen sheen than the higher thread-count sheets owing to the fact that they are Egyptian cotton. I bought "beige" which in reality is a golden caramel shade, which is a perfect pairing for my autumn theme quilt. Sadly, no joy. Upon washing with cold water (twice with baking soda and vinegar to eliminate the factory odor) and drying on low as I do with all my sheets, the fitted sheet barely fit on my mattress with foam topper. Between corners the mattress pad was visible because the sides of the fitted sheet do not drop low enough for the elastic to run under the mattress. While I managed to get them on the bed, the overly-tight fit probably would have caused the elastic to give out prematurely or eventually cause the sheets to rip trying to force it on so I took the sheets off right away and now have to figure out what to do with them.The SUPERIOR packaging states that the pockets are 18" and I only needed 15" so I thought I was within the margin for error; however, they simply do not fit. My mattress isn't a pillow-top, just a standard mattress with a memory foam topper. I can rule out shrinkage because I followed the laundering instructions — so I can only cite the possibility that the factory in India makes some sheets that are deep pockets and others that are standard and that by mistake I got the "Deep pocket" packaging but not the deep pocket sheets.Another thing buyers should be aware of is that the elastic on the fitted sheet is very thin. I have other sheet sets where a substantial piece of elastic runs the length of the fitted sheet, whereas this elastic offers very little resistance and probably would not last all that long before losing its grip even if the pockets had been deeper. (Relevant to anyone who would characterize a corner of a fitted sheet popping off the bed at night as a pet peeve.)The other set of sheets I bought here on Amazon by CKG have great reviews and claim to be "sateen" but the packaging doesn't confirm it on receipt they do not have the sateen feel (smooth) or look (shiny). I do not consider myself a "bedding snob" in the sense that I have never bought Egyptian or ultra-high thread count sheets — however, years ago locating quality mid-range sheets with a genuine sateen feel and look was not particularly difficult. With more people shopping online during the pandemic vs. at bricks-and-mortar retail stores — and the added pressure of inflation — prices have gone up for consumers but that doesn't necessarily reflect quality. Perhaps the takeaway is to support local retail stores because there is an added measure of accountability when the product in question has to pass the "in person test". Online, the best we consumers can do is go by product reviews. Either most of the reviews here don't have deep-pocket mattresses or Amazon hasn't permitted the less favorable reviews to post at the same rate they are allowing the 4-5 star reviews. Whatever the case may be, I hope my review will help spare someone else with a 15" or greater mattress height the trouble of buying sheets they can't use despite the product description in which it is said these sheets will fit an 18" deep mattress.