This blue Nomad Carpet from 3M, most commonly called Miner's Moss, has endless loops of rubber filaments perfect for catching and holding fine gold and heavy black sands. It loads up with fine heavies like a sponge and cleans up with a bit of vigorous stretching in a clean up tub full of water.
This is the blue variety of unbacked moss that shows off the gold well and works great on its own or over the top of ribbed rubber matting.
We sell our moss at 36" by X" increments with quantity setting the number of inches wide. Example: A quantity of 10 means you would like a piece of moss 10" x 36".