This Elonga 1.0mm multi-strand stretch cord is a unique stringing material made up of several individual stretchy strands bonded together for superior elastic properties. Elonga won't stretch out, and the multiple-strand construction has an inherent safety feature; Elonga will start to fray before breaking, giving notice that restringing is necessary, unlike monofilament stretch material that just breaks. It's easy to use with big eye or collapsible needles. This stringing material is easy to knot, too. To secure knots, use a flexible adhesive. For comfort, durability and design integrity, try Elonga today.