CONCAVE CHAIRBACK

The concave shaped back of the chair, where the user leans his back, is composed of two inclined planes wich remains separeted one from the other.This chairback typology is well thought out and made in such a way that the contact between the user and the chairback happens beside the spine,avoiding any compression at the spine (see drawing).More over this chairback holds easily the body in vertical position and is easeful for the back muscles.The benefits of the concave plane of the seat and the concave chairback add each other giving more wellbeing to the user.