So I've been sitting on this chair all day and it's not noticeably uncomfortable. But the backs of my legs start aching around 5, and it just gets worse and worse. I finally realize that there is something about the seat of the chair that is causing me serious pain, and I trade out (there are floating chairs nearby to grab- I was warned away from the green one because it was 'nasty'- I didn't ask for details) for a chair that looks almost the same. But what a difference- I think that chair was trying to give me cancer. What a relief.