This product uses strong magnets for secure and fast access. Please read before use: Do not wear this product directly over pacemakers, defibrillators, or any implanted or medical devices. Maintain a safe distance (at least 6 inches / 15 cm) between the magnetic closure and any medical device. Do not store magnetic stripe cards (hotel keys, access cards, etc.) in the front pocket or near the magnetic closure. Keep mechanical watches and other magnet-sensitive items away from the closure area. Magnetic fields may affect compasses and certain electronic sensors. If you have any implanted or medical devices, consult your physician before using this product. Modern smartphones and most electronics are generally safe, but should not be placed directly against the magnetic closure for extended periods. The manufacturer is not responsible for damage to magnetic-sensitive items resulting from improper use or failure to follow these guidelines.