Fastening method for flexible material

Means for fastening an edge of a strong, flexible material to the body of the material to form a loop at the edge comprising a first plurality of slits beginning at an edge and extending inwardly perpendicular thereto, the slits terminating in a plurality of substantially rectangular cut-out sections perpendicular and symmetrical thereto, a second plurality of slits located inwardly of the first plurality of slits, the second plurality of slits being substantially parallel to the first plurality of slits and terminating in a second plurality of substantially rectangular cut-out sections perpendicular and symmetrical thereto, the first and second plurality of cut-out sections facing each other with no slits between them, and the first and second plurality of slits and cut-out sections being equidistantly offset with respect to each other.