Abstract: A portable mat which keeps itself clean teaches a combination of nine upper surface panels of hard rubber, EPDM, hard neoprene, a very durable bottom surface/substrate holding the mat panels, which may be the neoprene in unitary body embodiments or a separate material in other embodiments, a formula for placement of the panels upon the substrate, a specific folding sequence, and a tenth mud-flap outside of the regular 3×3 pattern of the other nine panels which completes the folding sequence with every bottom surface covered by another bottom surface and no top panel in contact with any bottom surface. A handhold at one corner and indicia on the top surface assist the user in properly folding, as do the formulaic gaps which allow tight proper folding and prevent improper folding.

Abstract: A portable mat which keeps itself clean teaches a combination of nine upper surface panels of hard rubber, EPDM, hard neoprene, a very durable bottom surface/substrate holding the mat panels, which may be the neoprene in unitary body embodiments or a separate material in other embodiments, a formula for placement of the panels upon the substrate, a specific folding sequence, and a tenth mud-flap outside of the regular 3×3 pattern of the other nine panels which completes the folding sequence with every bottom surface covered by another bottom surface and no top panel in contact with any bottom surface. A handhold at one corner and indicia on the top surface assist the user in properly folding, as do the formulaic gaps which allow tight proper folding and prevent improper folding.