... Unfortunately something broken in the first 60 degrees-wash (air-dried, so no shrinkage due to hot dry). the rest is classified as kochecht, which should not then be. by fixing means wider rubber bands on all four corners but everything really stays where it should be. A big plus is the unbleached, very soft, no fold under the sheet forming and really good warming cotton, especially with the current weather. Buy recommendation for those who can live with the fact that not exactly all four corners of the mattress are covered.