The Kuperus Oslo box spring stands for comfort and Scandinavian sleeping pur sang. The Oslo sleep system is two-piece: it consists of a box spring and a top mattress. The base is a solid Swedish wooden frame with a raised lower edge of 18 cm. On this frame there are two layers of springs. Separated by a jute pressure divider then follow the extra-high pocket springs of no less than 18 cm high. These are available in four firmnesses. For
a top mattress on this box spring you can choose from top mattress Hammerfest, Varberg , Göteborg or Trondheim.