Material: This bag is made of high-quality polyester, tightly woven from strands of silk, for durability. Features: Circular sports shoelaces are double knot design, the inner layer is solid design, and the outer layer is suitable for hiking, mountaineering, sports and running. Multi-purpose: shoelaces are well made and have superior performance. Round lace-up suitable for any workplace boots, sports shoes, sports shoes, tennis shoes, hiking shoes, bowling shoes, dress shoes, etc. Date First Available April 11, 2024