Replacement laces are available in Black and Desert Sand and include new matching cord locks. Laces are sold in pairs (2 laces, 2 cord locks). As mileage accumulates the laces begin failing at the point where they cross over themselves. We advise replacing laces when they fray or the internal strands begin breaking. Longevity depends on the shoe type, number of miles and the runner. Laces on the leather top sandals show wear after about 200 miles and Water Moccasins after 300 miles. Detailed lace replacement instructions are included with each order.