pongopsI'm 160lbs and have been sitting like a ball, knee touching chin, for the past year in the chair and the cushion is still going strong. My old chair went flat within a month.
DXRacer uses absurdly thick foam in their chairs.
pongopsWe have a now 3 year old DXRacer Iron Series Chair in the office still being used today. It looks nearly the same as when we got it. Very durable and good quality chair.