Shoelace for e.g. long-distance runner, has flexible envelope for covering elastic core and comprising twisted loop stretched under traction action applied to lace on both sides of twisted loop for lacing and tightening shoe on foot

摘要

The shoelace (1) has a flexible envelope for covering an elastic core which is constituted of rubber threads. The envelope has a twisted loop (12) stretched under a traction action applied to the lace on both sides of the twisted loop for lacing and tightening a shoe on a foot. The twisted loop is reformed after relaxation of the traction action for maintaining the tightening of the shoe using the lace.