Other shoelaces, even some elastic ones, create one central pressure point at the top of the shoe, where the lace is tied. The pressure is felt when the foot swells from exercise or arduous walking. Xtenex laces protract and reverse to stay in place.
If you need customization for a narrow toe, or an unusually high instep, the cool shoelaces can correct tension to accommodate the fit. Any excess lace can be knotted, or tucked in the side.
Besides athletic shoes, Xtenex makes laces specifically for the narrower eyelets of most dress shoes.