A wear-out assessment system comprising: - a patient interface configured to deliver a flow of breathable gas to an airway of a patient, and - a wear-out assessment unit is configured to determine wear-out data relating to a wear-out of the patient interface, characterized in that the wear-out of the patient interface is due to material degradation of at least a part of the patient interface, the patient interface comprises a first wireless communication unit, the wear-out assessment system further comprising a second communication device comprising a second wireless communication unit configured to wirelessly communicate with the first wireless communication unit, wherein the first and second wireless communication unit (18, 19) are configured to exchange at least parts of the wear-out data, wherein the wear-out assessment unit is configured to issue on the communication device, depending on the wear-out data, a reminder to the patient to service and/or replace at least parts of the patient interface, wherein the wear-out assessment unit comprises a timer configured to measure a usage time of the patient interface and/or a counter configured to measure a usage count of the patient interface, and wherein the wear-out assessment unit is configured to determine the wear-out data based on the usage time and/or usage count, wherein the wear-out assessment unit is configured to trigger the timer and/or to increase the counter if an approach between the patient interface and the communication device is detected by means of the first and/or second wireless communication unit (18, 19). - a patient interface configured to deliver a flow of breathable gas to an airway of a patient, and - a wear-out assessment unit is configured to determine wear-out data relating to a wear-out of the patient interface, characterized in that the wear-out of the patient interface is due to material degradation of at least a part of the patient interface, the patient interface comprises a first wireless communication unit, the wear-out assessment system further comprising a second communication device comprising a second wireless communication unit configured to wirelessly communicate with the first wireless communication unit, wherein the first and second wireless communication unit (18, 19) are configured to exchange at least parts of the wear-out data, wherein the wear-out assessment unit is configured to issue on the communication device, depending on the wear-out data, a reminder to the patient to service and/or replace at least parts of the patient interface, wherein the wear-out assessment unit comprises a timer configured to measure a usage time of the patient interface and/or a counter configured to measure a usage count of the patient interface, and wherein the wear-out assessment unit is configured to determine the wear-out data based on the usage time and/or usage count, wherein the wear-out assessment unit is configured to trigger the timer and/or to increase the counter if an approach between the patient interface and the communication device is detected by means of the first and/or second wireless communication unit (18, 19). the wear-out of the patient interface is due to material degradation of at least a part of the patient interface, the patient interface comprises a first wireless communication unit, the wear-out assessment system further comprising a second communication device comprising a second wireless communication unit configured to wirelessly communicate with the first wireless communication unit, wherein the first and second wireless communication unit (18, 19) are configured to exchange at least parts of the wear-out data, wherein the wear-out assessment unit is configured to issue on the communication device, depending on the wear-out data, a reminder to the patient to service and/or replace at least parts of the patient interface, wherein the wear-out assessment unit comprises a timer configured to measure a usage time of the patient interface and/or a counter configured to measure a usage count of the patient interface, and wherein the wear-out assessment unit is configured to determine the wear-out data based on the usage time and/or usage count, wherein the wear-out assessment unit is configured to trigger the timer and/or to increase the counter if an approach between the patient interface and the communication device is detected by means of the first and/or second wireless communication unit (18, 19).