Rybo Revo Balance Chair Easy posture correction chair, used. Purchased new, it hasn't been used extensively, but there is some deterioration due to age. There are no tears or scratches on the seat cover. However, there are some age-related stains and wrinkles (Photos 9, 10). The seating surface is clean on the underside of the cover (Photo 17). There is fraying on the footrest (Photos 18, 19). As shown in Photo 14, it will be disassembled and shipped via Yamato Takkyubin. The instruction manual is not included, but a copy of the assembly instructions found online will be attached. Also, the hex wrench required for assembly is included.