Abstract: A bed covering product, system and a process of manufacturing such product is disclosed to form a one-piece, multi-panel upper and lower sheet assembly. The lower sheet fits on a mattress in a removable manner and the upper sheet is connected to the lower sheet through expandable flaps of material made from elastic, stretchable material. An expansion flap zipper runs between the sides of the upper and lower sheets so as to close the assembly when it is zipped, whereby the upper sheet is pulled tightly against the lower sheet but when it is opened by unzipping the upper sheet is allowed to move away from the lower sheet to the extent of the expandable flaps of material. Another release zipper is disposed adjacent the expansion flap zipper and interior for allowing laundering the upper and lower sheets separately.

Abstract: A bed covering product, system and a process of manufacturing such product is disclosed to form a one-piece, multi-panel upper and lower sheet assembly. The lower sheet fits on a mattress in a removable manner and the upper sheet is connected to the lower sheet through expandable flaps of material made from elastic, stretchable material. An expansion flap zipper runs between the sides of the upper and lower sheets so as to close the assembly when it is zipped, whereby the upper sheet is pulled tightly against the lower sheet but when it is opened by unzipping the upper sheet is allowed to move away from the lower sheet to the extent of the expandable flaps of material. Another release zipper is disposed adjacent the expansion flap zipper and interior for allowing laundering the upper and lower sheets separately.

Abstract: A bed covering system is disclosed comprising an upper sheet and a lower sheet wherein the lower sheet fits on a mattress in a removable manner. The upper sheet is connected to the lower sheet through expandable flaps of material. A zipper runs between the sides of the upper and lower sheets such that when it is zipped, the upper sheet is pulled tightly against the lower sheet but when it is unzipped the upper sheet is allowed to move away from the lower sheet to the extent of the expandable flaps or material.