I am fully enthusiastic about my Microfiber fitted sheets. What many do not know that you have to wash microfibre definitely with fabric softener, because otherwise the "sparks", which is normal, however, as it indeed is a syntetic material. After I've googled a bit and have it tried it myself with the softener, no longer a problem. Very easy on the skin. I have 2x 100cm mattress and use as well as often times only a large fitted sheet, with a ridge height of 23 cm and it passt..daher I understand the previous comments do not, that it is closely ??