RE: richer nowMiner's Moss is a more common name. It is a rubber loop matting that holds gold well and cleans easily, which is a desirable trait. Carpets, burlap will hold gold where it is only released by burning them and panning the ashes. "Midas" Moss, as I knew it, releases all trapped material quickly and completely during clean up, it also creates it own system of low pressure on the bottom of the sluice. Good Stuff, I brought samples to Mkuvia in February. Expanded metal riffles with Miners Moss matting trapped gold being lost by a bowl system they were testing. The Miner's Moss and expanded metal riffles I brought showed them this bowl wasn't working and they modified the system to work to design. I think Emi is testing has jigs for any missed colors with expanded metal riffles and Miner's Moss.