■Abstract: As of 2022, what space travelers will wear when they go to space depends on the design and decisions of the spacecraft development companies. Since we are in a transitional period, many aboard the spacecraft passengers will be wearing jump suit type space suits for a while. The space suits are evolving and becoming simpler and simpler. That’s fine the meantime, but in the future, customers will want to go into space dressed freely, just like when they board an airplane or a ship. This paper redefines what space travelers wear when they go to space by dividing them into four categories: conventional flight suits, recent flight suits, future flight suits, and free attire. The findings from making replicas of space suits, and discussion of the results of our study on the merits and demerits of each category will be included as well.