This pannier is made from the best, most durable stuff around. The nylon fabric doesn’t absorb blood so it will not rot out like canvas can. This bag is made for those large and bulky items. Measures approximately 16″ X 26″ X 21″ DEEP. has a 1/2″ water pipe across the top & nylon straps and buckles. should be used with a lash rope and mantie. Made with 32 oz. Polyester Belting Duck, also referred to as “iron cloth”, these panniers are strong.