Sew up the sides opposite the folded side of the pad. Cut a length of fishing line about three or four times the width of the pad and thread it on the needle if you have one. The holes in the mesh are so enormous that you probably don't even need a needle, but there are a lot of layers to go through so if you've got one it will probably make the process easier. Start by making a knot on one end, sew along the side (not to close to the edge; for durability) and end with a knot on the other end. I tried to keep everything almost snug while sewing, but a looser stitch will probably work as well.