Kevlar reinforced laces are the perfect replacement laces for all working shoes or boots. Even casual shoes can be more comfortable with these high-quality laces. Kevlar reinforced laces are the perfect replacement laces. The tough design is built right in. The flat laces are heavy duty but with smaller aglets. The tough design allows for an extremely tight tie but flat laces will not pinch the instep. The weave design and Kevlar stitching keeps the laces tied better than the older laces. The Kevlar reinforced laces get strength thru their double design. A tube weave creates a polyester lace inter braided with three strands of Kevlar. The polyester synthetic material combination results in a longlasting shoelace while also providing a satisfying stay tied knot all day...or until you pull it for easy release. These laces are truly high quality “Made in the USA” laces designed and manufactured from USA yarns with USA labor. Available in all colors, these brilliant colors will not fade when washed, nor bleed on your shoes or boots when wet. Put one pair away or carry the extra pair for an absolutely worry-free day while at work or fun. Proper length is of utmost importance. No shoelaces will last long or remain tied for long if stepped on all day. The best way to get the proper length is to remove the old laces and measure your current laces from tip to tip without stretch. A vertical measurement hanging is best.