Elastic Shoelace &; Fastening System. One Size Fits All - Superior Comfort - Adjustable Tension THE MOST TRUSTED LACE Over 5 million pairs sold worldwide. One size fits all and easy installation. DOUBLE EYELET LOCKOur state-of-the-art double eyelet lock provides the most secure grip on the market. WATER RESISTANT- Our laces stay dry through any treacherous terrain. ADJUSTABLE TENSION- Our laces reduce the pressure points at the top of the foot which helps to increase blood flow below the ankle. FLEXIBILLITY - 6 strand elastic laces move with you and expand for added comfort and support.