4 and a base plate 5 the top layer 4 is heat laminated to the top surface and extends around the upper half of the edge surfaces 12 of the foam core 1 the bottom layer 5 is heat laminated to the bottom surface and extends around the lower half of the edge surfaces 12 of the foam core 1 therefore both edges of the top layer 4 and bottom layer 5 sealed the structure of the seventh embodiment also applies to the above mentioned embodiments with reference to fig1 the eighth embodiment of the invention comprises a polyethylene foam core 1 having a density in the range of 1 5 to 10 pcf a top layer 4 and a bottom layer 5 the polyethylene foam core 1 has a top surface 10 and a bottom surface 11 both the top layer 4 and the bottom layer 5 are composite layers and the elements of the composite layers are shown in the above mentioned embodiments furthermore the eighth embodiment comprises two holes 7 through the slider for being handhold accordingly the top layer 4 and the bottom layer 5 protect the foam core 1 as well as the first pattern 3 a and the second pattern 3 b from erosion by exposure to ultraviolet light moisture and abrasion furthermore the first and second patterns 3 a 3 b being visible from outside of the slider that attracts the users attentions numerous characteristics and advantages of the invention have been set forth in the foregoing description together with details of the structure and function of the invention and the novel features thereof are pointed out in appended claims the disclosure however.