web and being coupled to the bottom surface of the blanket web 12 by the stitching 24 or other means an exterior pocket end web 34 extends from the exterior pocket main web 30 and couples with the bottom surface of the blanket web 12 alternatively the exterior pocket end web 34 can be integrally formed as a portion of the base web 28 substantially as shown in fig2 of the drawings the exterior pocket main web 30 is positioned so as to overlap the interior pocket main web 20 so as to form a closure therebetween by this structure sand or other granular material can be positioned between the exterior pocket main web 30 and the interior pocket main web 20 and into an interior of the exterior pocket 18 sand positioned within the exterior pocket 18 can then flow into an interior of the interior pocket 16 so as to impart a greater weight to the anchor means 14 to secure the device 10 to a surface such as a beach or the like referring now to fig5 and 6 of the drawings it can be shown that the anchor means 14 of the present invention 10 may further comprise a fastening means 36 interposed between the interior pocket main web 20 and the exterior pocket main web 30 for securing the interior pocket main web to the exterior pocket main web to this end the fastening.