Good sleep starts with our children. The fitted sheets from Swedish Linens are not just fitted sheets. The fitted sheets are 100% organic, OEKO-tex and GOTS certified. They are made of percale cotton, in Europe (Portugal). Percale cotton has several advantages; it is durable and has breathability, mite repellent and hyopallergenic. There are 200 percale cotton threads per inch, the more threads the softer the fitted sheet feels. The longer the cotton threads, the better the quality of the cotton. Swedish Linens therefore combs the cotton, so that only the long wear remains and the fitted sheet therefore has a very good quality. Cotton percale has the property of becoming softer and more flexible after every wash.