SierraComfort SC-205B Ergonomic Kneeling Chair (Black Fabric/Dark Wood) Birch Wood construction Microfiber cloth used with seat and knee pads Curved frame to allow for extra mobility and rocking effect Ergonomic design to promote good posture Weight Limit: 250 lbs. / User Height Suggestions: 4'10" to 6'2" / Height From Ground: 20" / Seat Dimensions: 16" x 12" / Item Weight: 11 lbs.