Mobis II Seat is positioned forward to potentially promote the optimal open hip angle that may help to engage the core muscles and enable posture perfection. Pivoting seat leg empowers you to move 360 degrees and supports an active working environment. Tri-Flex Seat Cushion has built-in sitz bone contours for plush support and a waterfall edge that may help to reduce pressure on the upper legs. Ellipse-shaped base with nonslip rim provides stability for active postures. Easy-to-adjust, piston-release handles raise and lower the seat, encouraging a range of postures from active sitting to leaning. Seat pairs with any standing desk or table and is rated up to 300 lb. It accommodates user heights between 4'11" and 6'8".