The no tie elastic laces easily flex and stretch as you slide your foot inside, but they also deliver firm, comfortable pressure for a secure fit. Feet naturally swell and shrink throughout the day, and this change can be dramatic during a run, hike, long walk, or cardio session. Yank! Elastic shoe laces stretch and move with your feet to help prevent blisters, bruising, and rolled ankles. No matter how you move, Yanks! Surelaces help you find your footing.