Ballistic nylon in 1680D and 840D with a polyurethane coating and DWR finish. Originally developed for flak jackets, ballistic nylon is even more abrasion resistant than standard 1000D pack cloth, which makes it the go-to for pack bottoms, high-wear panels and heavy-use bags. About 11.8 oz (1680D) or 7.7 oz (840D) per square yard. Sold by the yard. Width: 60 inches.