THE LACE - The innovative curved tips of the laces allow the wearer to lace their shoes more easily through the increasingly weird eyelet configurations in athletic shoes. The laces are made with banded, multi-strands of elastic that won’t break (the same elastic used for bungee cords). The elastic laces give you greater flexibility with a more comfortable, snug fit throughout the whole shoe. The laces are also water-resistant. THE LOCK - The lock is a slidable and spring activated device. The locks are made from a strong, durable and lightweight plastic. The tension springs are made from a metal alloy that won't rust or corrode. The lock holds the laces in place (when knotted) so they stay secure and maintain the desired fit on the foot, never loosening.