I bought the 285 TC for my RV short queen mattress. Quality sheets, let alone percale short RV sheets are hard to find. For our RV I ordered my usual percale, linen, and these. While these are much lighter than my usual percale, they exceed them in quality. The cotton fibers are clearly long staple as there is absolutely no sense of slight fuzziness when running my hand across the sheet as in short staple (cheap) cotton. While the fabric is lightweight, the threads are tightly woven, creating a subtle sheen on the sheet. The difference in these compared to my usual, more expensive, name brand percale is similar to the difference between a man's fine dress broadcloth Pima cotton shirt vs the more utilitarian beefy oxford.These sheets fit the short RV mattress perfectly. They didn't shrink noticeably or develop permanent wrinkles in the wash. Shaking them out before putting them in the dryer and folding when done were all I had to do. I will buy the 415 TC next time as that is more in line w my husband's preferences in sheets.These are an excellent value. I can't remember ever buying a set of quality sheets for under $100.Diego responded quickly to my questions and even expedited the order so we could leave on time for the eclipse. I'm looking forward to buying not only a second set for the RV but some for the house as well.