CONVENIENT - No need for tying shoes perfect for 14+ kids,youth,elderly or those with limited mobility. MADE of high quality environmental silicone material, safe non-toxic, tasteless. EASY TO USE - Don not need to tie once lacing on, save time in your daily life. ELASTIC - Shoelaces elastic 16 pcs which lengths from 4.1cm (1.61 inches) to 7.1cm (2.76 inches. EASY TO CLEAN AND DURABLE - Silicone material, easy to clean wiping with wet cloth, sturdy for us.