(A) Mill: Propper International #400 black, Klopman Mills indestructible twill, Galey and Lord Dauntless # 1256, or equivalent.
(B) Content and weave: A blend of sixty-five per cent polyester and thirty-five per cent combed cotton in a twill weave.
(C) Weight: 6.3 or 7.25 ounces per square yard.
(D) Finish: Pre-cured permanent press, wrinkle and shrink resistant (nylon rip-stop yarns are desireable but not required).
(E) Tensile strength: One hundred twenty pounds warp, one hundred pounds fill.
(F) Tear strength: Eight pounds warp and fill.
(G) Construction: Eighty-eight warp by fifty filling yarns per square inch.
(H) Color: Black, vat dyed, colorfast, and fade resistant.