Using these New Balance shoes is easy. Just lace them up using the adjustable laces for a snug fit. They're great for low - impact activities like walking or light jogging, as well as for everyday wear. When it comes to cleaning, use a soft brush and mild soap to gently clean the synthetic upper and mesh. Avoid using harsh chemicals as they might damage the material. Let them air - dry, and don't put them in the dryer. Also, keep in mind that the 4 mm drop is approximate due to manufacturing differences. And since they have the APMA Seal of Acceptance, they're good for your feet, but still, break them in gradually if you're not used to this type of shoe.