These elastic black laces have made a big difference in my sport shoes.  First, they don't come untied every five minutes, which was driving me crazy with the slippery flat laces that came on the shoes.  Second, the elastic makes the shoes not only easier to slip on, but they self adjust for better comfort when you have your feet in different positions, i.e., walking, curled up in a chair, etc. They were quite easy to install.  With the three pair included, these shoelaces are a little zen for your feet.