Bedding Design Nubed Mattress by Manuel Fuentes Nubed is a mattress designed for comfortable rest. The mattress has rounded corners and a stretch polyester cover that contours to the body. Inside, hundreds of minisprings made of high resilience polyurethane foam create independent resting zones. The firmness of these zones varies along the mattress to give the right support to each part of the body. Air moves freely through the interior spaces, which improves the ventilation of the foam. Each layer is cut with a computer controlled machine and glued to the next one.