SIMPLE AND COMFORTABLE - The laces are woven from high-quality polyester, fully elastic and durable. Unique stainless steel screw lock design, no need to worry about shoelaces often loosening EASY TO INSTALL - Our elastic shoe laces just wear a shoe string and tighten the screw lock. Tie the knot and tighten the screw lock, it is very convenient. Fasten once and never tie your shoes again PERFECT FOR EVERYONE - They are great for kids, adults, and seniors. They are ideal gifts for the people who have difficulty tying shoes, or runners looking to speed their triathlon transition up SIMPLE AND COMFORTABLE - Adjustable compression keeps the shoes tight while reduces pressurePerfect for running, walking, hiking, biking, etc.Perfect for sneakers, boots, canvas, leisures, etc