Foam cushion and method of making and using the same

A method for manufacturing a foam cushion, the method comprising the steps of:

• (a) contacting with mixing natural rubber, ethylene-vinyl acetate (EVA) copolymer, azodicarbonamide, an anhydride grafted polymeric adhesion modifier, and a combination of zinc oxide and stearic acid for about 8 minutes to about 20 minutes at about 110° C. to about 130° C. to form a first mixture;
• (b) contacting with mixing the first mixture with dicumyl peroxide for about 1 minute to about 5 minutes at about 110° C. to about 130° C. to form a second mixture;
• (c) dividing the second mixture into lumps;
• (d) heating further with mixing the separated lumps of the second mixture at about 100° C. to about 120° C.
• (e) thinning a lump of the second mixture to form a sheet of a thickness ranging from about 0.1 mm to about 50 mm;
• (f) cooling the sheet to below about 80° C.;
• (g) stacking a plurality of the sheets in a press mold such that between 0% and 50% of the interior perimeter of the press mold remains exposed;
• (h) pressing the plurality of the sheets in the press mold for about 28 minutes to about 35 minutes at about 160° C. to about 175° C. to form a cooked stack;
• and
• (i) slicing the cooked stack into sliced pieces having a thickness of about 1 mm to about 20 mm to provide the foam cushion.