Patent attributes
In some embodiments, a system comprises a mat body characterized by a front side, a back side and a thickness; a plurality of anchors, each anchor comprising an anchor block having an aperture characterized by an aperture diameter, a suction cup having a sealing surface and an outer surface, and a stem that is coaxial with the suction cup and connects the suction cup to the anchor block. Each anchor may be disposed through the thickness, such that its anchor block is on the front side and its suction cup extends from the back side. The system may further comprise an elongated tether that is removably coupleable to one of the plurality of anchors, and the elongated tether may comprise an anchor end having a generally spherical anchor terminus characterized by an anchor diameter that is greater than the aperture diameter.