To use these New Balance 840V5 running shoes, simply adjust the laces to your desired tightness for a comfortable fit. They're great for running on various surfaces like roads, tracks, or trails. When you're done with your run, take them off and let them air dry. Avoid leaving them in direct sunlight for a long time as it might damage the material. To clean them, use a soft brush and mild soap to gently scrub the upper. Don't put them in the washing machine as it could harm the shoe's structure. Store them in a cool, dry place to keep them in good condition.