tubular between its ends it thus has a reduced width at this level and for example in the illustration described a width of 9 millimeters whereas the width of the stitching area is typically 15 millimeters this strap 10 is also produced on a loom of the type marketed by muller ch the three distinct areas of the ring that is the central band and the two ends are prepared by modifying the weave of the loom thus the longer area separating the two ends 5 6 is prepared with a twill weave whereas the tubular areas corresponding to the two ends are prepared with a taffeta weave during the phase of manufacture with twill weave the warp yarns work side by side in pairs whereas with the taffeta weave said warp yarns are individualized specifically for preparing a tubular area this tubular area is wider as may be observed in fig6 and 7 according to the invention the strap is prepared from high tenacity polyethylene like the material marketed under the registered trademark dyneema u00ae this material has mechanical properties compatible with the use of the ring in question according to the invention the two ends 5 6 of the strap 10 are joined to each other by stitching by superimposing them upon one another four thicknesses are accordingly provided at this level that.