The Traditional Futon Mattress by Karup Design is a firm, 13-cm-thick futon crafted from dense cotton blended with a touch of polyester, bringing structured support that softens over time. Handmade in Europe, it adapts to the shape of your body while maintaining Japanese-inspired firmness. Available in sizes from 80 to 200 cm and in Natural or Black covers, it’s a natural fit for futon frames, minimal beds, or multifunctional interiors. Care is simple: use a sheet, air regularly, and rotate occasionally to preserve its form and comfort for long-lasting use.