Patent ID: 7921500

Claim:
A surface-treatment tool comprising a flexibly-deformable sheet of non-absorbent material embossed with protrusions, each protrusion with an obverse side that constitutes a raised rubbing element on the face of the tool, and a reverse side bounding a cavity, the sheet being formed to have the shape of a closely-spaced array of similarly oriented hollow protrusions upstanding from either side of the sheet, the protrusions having mushroom-shaped cross-sections, each having a head that forms an apex of the cross-section and a stem that is narrower than the head, the protrusion forming cavities opening onto the reverse side and being fillable with a fluid, a solid, or a semi-solid, and such that the heads of the mushrooms comprise the operable face of the tool, while the interlinking space between the mushroom stems forms a sunken labyrinth running throughout the sheet accessible from the operable face and fillable with dirt.