In the EU COMFDEMO project, we aim at building the digital twin regarding the comfort experience of passengers in the cabin demonstrator. For this, we will conduct a study during a real-flight to collect data on the comfort of passengers. This happend on Nov.3, 2021. We had a super good research day! All researchers were present and a total of almost 100 participants. All participants had an air travel for 70 minutes whereby data was collected regarding the basic anthropometry and their experience on comfort. The flight was from and to Rotterdam airport.