Safco Focal Mobis Ii Seat Matte BlackDescriptionSpecificationsShipping Tri Flex Seat Cushion has built in sitz bone contours and a waterfall edge for plush support and may help reduce pressure points Pivoting seat leg inspires dynamic movement to keep users active throughout the workday Supports leaning posture encourages a hip to torso range of 130 to 135 degrees which provides less pressure on your spine and connecting muscles when compared to standing Easy adjust piston release