MilitaryNylon Strap. Made from soft,  lightweight and durable hard wearing seatbelt nylon. 
Perfect for Tool / Divers / Field and Aviation style watches. These straps wear comfortably on the wrist and completely adjustable.
In 1973, the British Ministry of Defence (MOD) added to their catalog of standard issue gear a new item named, “Strap, Wrist Watch”. The strap was constructed from two pieces of nylon fabric — a longer piece to wrap around the wrist, and another shorter piece that loops behind the watch case to prevent the case from moving up and down the strap.