Fast transition times. I've tried other similar brands and other designs of elastic laces with an adjustable clip. This brand works the best. It has enough elastic stretch to get my foot in and then holds it down securely. Other brands don't stretch enough so it's harder to get my foot in. The type with adjustable clip doesn't hold the lace tension the way I want throughout the run and I end up with the laces by my toes getting too tight. Xtenex is the best.
