The fabric used for the quilt must meet numerous requirements: it must be feather-tight, not permeable to dust and mites, but at the same time it has to ensure air permeability. The fabrics must therefore have a very dense and tight warp and weft construction. In the world of furnishing, the best cotton yarns are used to make these fabrics, in particular those obtained from long-fibre varieties, chosen for their characteristics: hygroscopicity, resistance, stability in water and alkaline washing solutions, and ability to withstand repeated washing.