I removed my four year old expensive Speer seat cushions due to the fact that the foam was cheap crap. I replaced them with a 30 year old seat cushion out of a dead combine. It is a little faded and cracked but still has decent foam.
I was three acres from finishing the field and the needle went below empty. Turned out that my bulk tank in the pickup did not have that extra 20 gallons I thought and so I had to drive back home to refill.