There is a link between back pain, poor posture, and chair design. So...

Are you sitting comfortably - or do you suffer from back or neck pain, are you worried about your slumped posture, or your children's?

Your comfort may depend on what you are sitting on. Work chairs are improving in design all the time, but school furniture, sofas, public seats are not.

Your comfort may also depend on how you are sitting. Good posture is comfortable, healthy, and attractive. No chair can give you good posture - but some make it easier and some make it nearly impossible.

School chairs and office chairs, sofas and armchairs, train seats and cinema seats, they all have different requirements but the essentials remain the same.

What are the essentials?