TM 10-8415-209-10 TM 8415-10/2 b. If PASGT helmet is worn, don chemical Protective helmet cover. c. When   directed   by   unit   MOPP,   don   GVOs, BVOs, or CPFCs (1) over combat boot.  (When insulated rubber, cold weather boots are worn, chemical protective overboots are not required.) (1) Button  or  lace  GVOs,  BVOs,  or  CPFCs (1). (2) Blouse  overgarment  trouser  legs  (2)  over chemical protective overshoes (1).  Close trouser leg slide fastener   (3)   and   snug   and   tie   drawcords   (4).      In   hot weather,  the  leg  may  remain  loose  for  comfort  until  unit MOPP directs that it be secured. 2-21