XTENEX X300 Series 30" Shoelace - Patented Flare Knot, Performance Fit - Enhanced Comfort - Light Blue

XTENEX (indeXed-TENsioning-nEXus) is a worldwide patented elastic shoelace technology that produces adjustable tensioning between a shoes eyelets. XTENEX Laces have an elastic core and a series of knots along the entire length of the lace at consistent length intervals. Stretch the lace and the knots disappear, allowing you to thread the lace through the eyelets. Release the tension and the knots reappear. More knots between eyelets lessens the tension; fewer knots between eyelets increases tension.