 The Thunderbird Jacket was withdrawn in the 1990s and replaced with an additional pullover, the design reverting to a round neck but retaining the pen holder, the official description being Jersey Man's (Woman's) Blue Grey Round Neck.In the 1990s an RAF blue nylon foul weather jacket and overtrousers were issued.Although not initially intended it quickly became standard practice for officers and other ranks to attach rank badges to the lapels and wear the nylon jacket in place of the uniform raincoat, as a more practical modern wear.