Generally speaking, the better the elasticity of the fabric, the better wrinkle resistance of the fiber. For example, polyester is not easy to wrinkle, but pure cotton, silk, hemp and fabrics of the kind are easy to wrinkle; When cotton cloth is pulled, the elastic recovery rate is less than 50%, Tencel has almost no elasticity. As a result, when we "roll the sheets", we will find that the sheets are often shrunk into a ball, and then the fabric will wrinkle, or when the washing machine is washing, it will also be because of the agitation of the washing machine. To prevent our sheets from getting wrinkled, they should be dried flat after washing or ironed at a low temperature after drying. If you are lazy like me and don't want to iron them, don’t worry, you can just lay the sheets out flat on the bed and look at it later, it might not be so wrinkled.