If you're reading this, you're probably reading it on a computer and - chances are - sitting with the sort of shoddy desk posture I usually adopt. Enter, stage left, Vitra's smart new HeadLine chair. As well as looking after your lower back, it goes one further and supports your neck and shoulders, handily doubling as a shield to stop your boss noticing you've fallen asleep on the new lux ortho-eco chair he bought you. Best of all, though, is what it does to look after the ol' planet...