This is the "Miyatake Seisakusho Proportion Chair (Balance Chair)," recommended for long hours of desk work or studying. I purchased it used some time ago. I haven't used it much. By distributing your weight on the knee cushions, it naturally straightens your back and supports the ideal posture of tilting your pelvis. 【Product Features】 ・Designed to straighten the back, effective for posture improvement ・Double support structure with seat and knee cushions ・Natural wood frame (natural color) ・Height adjustable (adjustable up to approximately 10cm) ・Bright green fabric upholstery 【Size (approx.)】 Width: approx. 48cm × Depth: approx. 61-68cm × Height: approx. 43-64cm 【Condition】 Although it is a used item, there are some minor scuffs and scratches on the fabric, but there are no problems with use. The auxiliary cushion has some flattening. There are scratches on the wooden frame, but the screws and adjustment parts function properly. #ProportionChair #MiyatakeSeisakusho #BalanceChair #PostureCorrection #PelvicSupport #StudyChair #MiyatakeChair #ProportionChair #KneelingChair #PostureSupport #ErgonomicChair