TM 10-8415-209-10 TM 8415-10/2 (2) Battle Dress Overgarment (BDO)/Overgarment (OG84).    The  BDO  is  a  camouflage  overgarment consisting of a coat and trousers.  This suit is normally worn over the duty uniform, however, in high temperatures it may be worn over underwear.  In extreme cold weather, the BDO will be worn under arctic clothing for camouflage. The   BDO   provides   protection   against   chemical   agent   vapors,   liquid   droplets;   biological   agents;   toxins;   and radioactive alpha and beta particles.  The BDO is not intended to be decontaminated, reimpregnated, or laundered, and  should  be  properly  discarded  after  exposure  to  chemical  agents  in  accordance  with  FM  3-5/FMFM  11-10. Contact with petroleum, oils and lubricants (POLs) will significantly degrade protection provided by the BDO.  The nylon/cotton outer layer is treated with a durable liquid repellent.  Whereas it is water resistant, it is not water proof, and protection may be degraded when suit is soaked.  Refer to FM 3-4/FMFM 1 1-9 for protective capabilities. 1-15