These panniers are made from Iron Cloth fabric; a ballistic nylon material that is washable, incredibly durable, versatile and won't fray, rot or rip. These ballistic nylon bags have large lids with side flaps to keep rain and snow out, and are reinforced with heavy duty polypropylene webbing wherever needed. Hanging straps are 1½" wide x 34" long. Top pack attachment dees are included. Our TrailMax PolyPac Inserts fit easily into these. Dimensions: 24"L x 18"H x 11½"D.