I was in rehab for a stroke and had great difficulty tying my shoelaces. These lock laces solved my problem very nicely. Have been using the pair I bought 2 months ago and they still work great. There has been no need to re-adjust them due to stretching. A very useful and easy to use product which I highly recommend . I never have to worry about the laces becoming untied and tripping over them. My only complaint was that the directions were not clear and the accompanying pictures were too small to be useful, even using a microscope.