These laces are elastic. I read the other review where someone used them to replace their Salomon laces, which is what I needed done. I don't run in Salomon's anymore but did like the lacing system, so I have purchased Salomon replacement laces in the past and used them on other running shoes, so I thought I'd give this cheaper set a shot.My shoe size is 9.5 and these laces barely were able to fit the shoe. They are elastic so I am still able to slip the shoe on but I have no need to tighten the laces. In fact they are a little too snug. First run I did in them I had to stop to adjust the laces because they were cutting off circulation.If you are looking to use something for running spend the money and buy a Salomon pair.