To use these New Balance FuelCell trainers, just lace them up using the corded eyerow for a custom fit and start your workout. Whether you're running on the gym floor, training on turf, or walking on concrete, they'll provide comfort and stability. When it comes to maintenance, you can gently wipe the shoes with a damp cloth after use to keep them clean. Avoid using harsh chemicals as they might damage the materials. Also, let the shoes dry naturally in a well - ventilated area, not in direct sunlight. Don't over - tighten the laces to prevent any discomfort. And if you notice any loose parts or damage, it's best to get them checked or repaired.