I do love these laces.  Be aware that I had to use great force with pliers to close the clip at the end of the laces.  Once you put these on a pair of shoes, they are likely there for life.  Why?  When you cut off the extra length,  the ends will get frayed and it won't be possible to get them through the eyelets again.  So be aware of this limitation.  Thus,  I am getting  a pair for every pair of shoes and will not likely try to reuse them.  I also love the color selection.

Because of the design, they do not stretch out but do have enough give to make the shoe very very comfortable.  I love these.  It makes my lace up shoes into slip ons that stay on and fit perfectly.