I was going to get into Prone shooting, but it never happened. I had bought this mat from Champion Shooters in Ohio. It's "new", although not in a "box" as the condition, above, states.
Champion Carry-all Mat.--- Paid $82. Folds up; has carry handle; has rough rubber area to prevent elbow slippage when in Prone position; has fold-out flaps for under legs/feet; has waterproof bottom.