Our box spring mattresses, Stora Harpö and Lilla Harpö, are the perfect choice if you want to treat yourself to the feel of a bed from Carpe Diem Beds, but would prefer to choose your own bed frame. Stora Harpö is our exclusive box spring mattress and combines two unique spring systems for optimum sleep. Lilla Harpö is a luxurious box spring mattress with our patented Visco Elastic Bottom Layer, which absorbs pressure from your body. Stora Harpö and Lilla Harpö come in multiple single, double and king sizes. Choose from soft, medium and firm box spring mattresses and 34 different fabrics in several colours. The box spring mattresses are Nordic Swan Ecolabelled and the fabrics are certified to Oeko-Tex® Standard 100.