TM 10-8415-209-10 TM 8415-10/2 a. General.  The AUIB is sized similar to the CWU-27/P flier's coverall.  The coat and trousers are a duty uniform, not an overgarment.  The main difference in sizing is that the coat has a larger chest.  In addition, the coat and  trousers  are  sized  adjectively  (small,  medium,  large)  as  opposed  to  numerically  (38,  40,  42).    Use  the  size prediction chart as a guide to determine your approximate coat and trouser size.  If your chest size or waist size falls between  two  sizes,  you  should  go  to  the  larger  size.    This  is  a  general  rule.    The  coat  and  trouser  will  not  fit  as snugly as the CWU-271P fliers coverall.  Wear the size that is most comfortable. NOTE Perform PMCS on individual equipment IAW Table 2-1 prior to use. b. Open  vapor-barrier  bags  containing  AUIB  coat  and  trouser  and  perform  PMCS  IAW  Table  2-1.    If  any damage exists, exchange item for a new one using designated supply System Retain containers and packing. 2-39