The sheet with stitched corners pulled on the bed mattress. From Värnamo of Sweden. Fits 3 to 7 cm bed mattress. Sheets are available on mattresses that are up to 9 cm but then you have to fight a little to get on the sheets and at the same time be careful with the seams. Envelope sheets are great for anyone who is moving in bed and who wants the sheets to lie in place. This is excellent when it comes to bunk beds. Better than pull on sheets with elastic that are not stubborn to store in the linen closet. Material: 100% percale cotton. The percale sheets are made of fine combed cotton which gives a nice and luxurious feel. Wash at 60 degrees. Dimensions: 90 x 200 cm. Colors: White.