In most cases, a duvet cover is constructed by stitching together two rectangular sheets of cloth on all four sides. One sheet is then cut lengthwise along the center, allowing the duvet to be fitted within the cover once it has been folded. Additionally, high-end duvet covers include ties at each corner, which allow the duvet cover to be fastened to the duvet at each of the four spots where it is tied. This design prevents the duvet from being bunched up within the cover.
When we use the term bed linen we are generally referring to the sheets used to cover the mattress so that the sleeper is comfortable and the mattress is protected. If blankets or covers are being used a second sheet needs to be used for comfort between the sleeper and the roughness of the blankets. If a continental quilt is being used the top sheet is usually omitted.
A durable, lightweight fabric, cotton percale is a good option for anyone that sleeps warm and needs a little cooling.
