Are the fabrics certified organic?  Natural Slipcovers carries a line of fabric suitable for slipcovers that is made from certified, organic cotton.  The colors in the patterns are the natural colors of cotton:  cream, shades of taupe and brown, and a beautiful muted green.  No chemicals are used in the processing.  From another company I can offer organic cotton fabric that has been dyed with an "earth-friendly" dying process.      The hemp fabrics are grown without herbicides, fungicides, or pesticides.  They are not certified organic,  but are available un-dyed as well as unbleached.  Additionally they are naturally resistant to mould. Are the slipcovers washable? That depends.  Most fabrics will shrink when washed.  They may also change in texture.  Often the washed appearance is more beautiful than the way the fabric looked before washing.  If you plan to wash your slipcover Natural Slipcovrrs highly recommends that the fabric be pre-washed prior to cutting. Call for an appointment to view pre-washed and un-washed organic cottons and hemps. What options are there for musty, mouldy furniture? If you have allergies to mould and mildew and your furniture smells musty, you may prefer to have your furniture reupholstered first.  The old straw and musty cotton batting can be replace with (non-organic, 100% synthetic) polyester batting and new (non-organic, petro-chemical-based, 100% synthetic) foam.  These options may not be the best for the world's environment, but they may make your home environment a healthier place for you if your allergies are primarily to organic matter  (dander, mould, dust).  To minimize dust and animal dander washable slipcovers can be made to go over the re-furbished furniture.