Materials
2.5 Where a synthetic cover material is used and the seams are stitched, the thread shall be of synthetic material. Where cotton cover material is used the thread shall be of natural fibre or a combination of synthetic and natural fibre.
2.5 Where a synthetic cover material is used and the seams are stitched, the thread shall be of synthetic material. Where cotton cover material is used the thread shall be of natural fibre or a combination of synthetic and natural fibre.