TACTEL nylon with environmentally friendly PFC-free DWR CORDURA rip-stop knees, seat and instep with environmentally friendly PFC-free DWR Part-elasticated waistband Zipped fly with button closure Removable webbing belt with low profile hook closure. These trousers are made from durable nylon with reinforced rip-stop panels on the knees, seat, and instep for extra protection. They feature a part-elasticated waistband, a zipped fly with a button closure, and a removable webbing belt for a secure fit.