100 % Polyester filament Bobbinfil No. 70 bobbin thread is the choice of professionals who want the best for machine sewing and embroidery. The thread's quality has been specifically developed for optimal use on high speed computerised embroidery machines. Bobbinfil is much finer and lighter than other bobbin threads so much more can be wound onto the bobbin of the machine, eliminating frequent winding down of underthreads and guaranteeing the best embroidery results. Even large designs can easily be embroidered without the need of changing the bobbin. Bobbinfil can be used with all MADEIRA embroidery threads on all sewing and embroidery machines.