I have used two sets of these sheets (purple and charcoal) for a year. I just bought a third set in black and now have all three in rotation for my adjustable bed.Honestly, I thought that for the price, the first sheet set was going to start unraveling or become thread-bare in no time flat. I have been so pleasantly surprised. When my husband and I were first married, we used "t-shirt" sheets. Then, we upgraded to very high thread count cotton sheets. I expected that these were going to be a disappointment, but it's hard to find sheets for split king, so I was willing to risk it. SO glad I did. They are everything I've wanted in a split king set (and I can't tell you how grateful I am to have learned that two twins pushed together is called a split king - not even the mattress store told us that). Before I learned that this was what they were called, I was buying two fitted sheets and then paying through the roof for an individual flat sheet.I live in southwest Florida (two hours south of Tampa), so I need sheets that aren't going to make me feel hot/sweaty. These are incredibly soft and no matter the temperature, my husband and I both feel comfortable in these sheets - and I'm often cold when he's warm, even during the hot summer months here. I obviously can't speak to how they feel for those of you in places where it's constantly cold.REALLY IMPORTANT NOTE ON WASHING: There was some confusion at first re: do you wash on cold or warm, because the product description is contradictory.There is a *graphic* here on Amazon that says this: <<Hand or machine wash in hot or warm water with mild detergent is recommended>>But the actual product description and the reviewers who have no issues wash on cold (goes against everything you think when you think about washing the sweat or whatever out of sheets) <<Special Easy Care Fade, stain, shrink and wrinkle resistant. Machine washable in cold, dries quickly on tumble dry low temperature. Hypoallergenic, anti-bacterial, environmental friendly and resistant to dust mites. >>In addition, when you open the package, the directions confirm to wash on cold. If you have a washing machine with a "my cycle" like I do, set that to be your sheet setting. I use the "my cycle" specifically for these sheets and have not had any issues with them. Stains clean up from these really easily in the washing machine and I can't even see a shadow of where stains were. I do wash them for 50 minutes, simply because I was so used to washing sheets on warm, so I just think that the more time they have swishing around in detergent, the better.One of the things I love about these is how the elastic on the fitted sheets is a heavy-duty band that has never once come unfurled, even when I've adjusted my bed to sit up and lifted the leg part of the bed to where the bed sits at a strange angle. That's where I expected inexpensive sheets to come undone. Nope. Hasn't happened. I have a mattress that's about a foot in depth, too.As other reviewers have pointed out, yes, these sheets are thin. I expected them to become thread-bare quickly, but that has not happened. Not to the purple (which is a gorgeous, deep shade of purple) nor the charcoal (note that my pics are of the charcoal, not the silver).I love these sheets and have recommended them to others I know with adjustable beds. I sent my mom a set, and she thought I spent more than twice the amount than I did.EDIT: It is now August 2020 and I have had new mattresses from Cariloha since February - all bamboo (yes, absolutely recommend). We still have those same three sets of sheets in rotation. Sometimes, when I adjust the bed to sit all the way up, the top edge of the sheet starts to pull. . .I'll hear the sound, but it has never actually popped off. So going from a Beauty Rest to a Cariloha Resort has made a bit of a difference on how well the sheet "grabs" when I adjust the bed. We do adjust the sheets a bit more, and we did not do that before we bought these mattresses. Just a very minor issue. About to buy our son a full-size Cocoon Chill (Sealy) mattress next (he's been on a twin), and will be buying sheets here to go with that.EDIT MAY 2021: Bought the red sheets in a full size for my son's bed. No issues, but I didn't expect there to be, especially since he doesn't have an adjustable base. BTW, if you are a hot sleeper, consider that particular bed - it does NOT retain heat, either. As for my bed, we still have these three sets in rotation. The purple ones are my favorite, just because the color is so pretty. . .and they are STILL pretty.