How are Focal leaning seats different from sit-to-stand options?

Focal’s leaning seats provide a sustainable option for working upright in a natural, neutral posture. You can enjoy the benefits of standing and experience the same comfort level as when sitting. In between sitting and standing, Focal seats induce essentially the same posture we assume in zero gravity. This indicates minimal stress and pressure on muscular and skeletal systems. And, since the majority (80+%) of sit-stand desks are used exclusively for sitting after 4 weeks (old habits are hard to break!), their claimed health benefits are seriously minimized. Plus, standing only, day in and out, is not a great option for the vast majority of people.