Sareer Matrah Gel Coil Mattress in a Box - 6ft Super King Size; Designed for support and comfort, the Gel Coil mattress combines robust open coil springs with the cooling properties of innovative Gel-Lex. Providing a cool, fresh and supportive night39;s sleep, Gel-Lex has the ability to control temperature, humidity and mould itself to your contours. By evenly distributing you weight, Gel-Lex offers you the feeling of instant relaxation, resulting in reduced pressure points and less tossing and turning. Traditional open coils make up the interior, with rows of springs set out from head to toe and connected into one single unit by helical spiral wires. To add strength and stability to its border, a thick rod-edge wire is attached to the perimeter rows of springs.This reinforces the edge of the mattress. Its an easy-care mattress that does not need to be flipped over, but we recommend regular rotation for long-lasting support and comfort.