These shoulder bags are super easy to use. Just slip your phone, wallet, keys, and other daily items inside. To carry, simply put the strap over your shoulder. When it comes to maintenance, use a soft, dry cloth to wipe off any dust or dirt. Avoid getting them wet as much as possible, as the polyurethane material might be affected. And remember, due to the presence of chemicals like lead and cadmium, don't let children play with these bags unsupervised. Keep them away from food and drinks to prevent any accidental ingestion of the harmful substances.