Using these faux leather shoulder bags is easy. Just open the bag and put your daily essentials like your phone, wallet, and keys inside. When carrying it, you can use the shoulder strap to hang it on your shoulder comfortably. As for the precautions, be aware of the California Proposition 65 warning about the chemicals in the product. To maintain these bags, wipe them gently with a soft, dry cloth regularly. Avoid exposing them to sharp objects to prevent scratches, and don't put them in direct sunlight for a long time to avoid color fading.