The horse stall mats are recycled rubber and vary in thickness, 3/4" or 1" thick, about 3-4
' x 7-8' were about $40-$50. Really heavy.
I though that they could be cut in half and be still be large enough to bomb chunks of wood onto the doubled-up mat. I suppose two full sheets would be big enough to drop a top. I suppose they could also be cut lengthwise and used in the shop at the work benches, then taken into the field for truck tire strips. Could be used when working close to a house/ fence as protection, too.
Seems like it is still likely to have a compressed area, even if doubled up to be 1.5-2" thick, but much better than without. I suppose one could lay one down, sandwich some brush in the middle, and lay another down as the top piece of bread.
What about bounciness?