The Xpand Laces is a long-lasting elastic lace made of zero-memory elastic rubber that provides an unswerving comfy fit throughout your day. The Xpand laces work on all types of shoes. The pack contains a pair of elastic laces which measures 52 inches long and can be stretched out to over twice its length. Ensure that you try out the length before trimming the laces for a comfortable fit. It includes 4 Xpand patented lace anchors and 4 end clips.