I needed a mat to span the length of my longarm as I can't stand for long. My carpet is very dense also. The lowest price I found was $300 without shipping, so my other half ended up buying I think it was birch plywood that is very hard and sanded it. I can roll around on that baby like no tomorrow! I thought it would buckle, but its so strong it's amazing! I bought a tall barstool on casters so I can glide back and forth- so far so good!