▁of ▁glo ves ▁and ▁bo ots ▁are ▁don ned . ▁These ▁may ▁or ▁may ▁not ▁be ▁attached ▁to ▁the ▁gar ment . ▁The ▁gar ment ▁itself ▁may ▁be ▁one ▁piece ▁or ▁a ▁two - pie ce ▁h ood ed ▁suit . ▁Level ▁B ▁protection ▁also ▁requires ▁the ▁we aring ▁of ▁chemical - res istant ▁bo ots ▁with ▁steel ▁to es ▁and ▁sh anks ▁on ▁the ▁outside ▁of ▁the ▁gar ment . ▁As ▁with ▁Level ▁A , ▁chemical - res istant ▁glo ves ▁and ▁two - way ▁radio ▁communic ations ▁are ▁also ▁required . ▁Level ▁C ▁Level ▁C ▁protection ▁diff ers ▁from ▁Level ▁B ▁in ▁the ▁area ▁of ▁equipment ▁needed ▁for ▁resp ir atory ▁protection . ▁The ▁same ▁type ▁of ▁gar ment ▁used ▁for ▁Level ▁B ▁protection ▁is ▁worn ▁for ▁Level ▁C . ▁Level ▁C ▁protection ▁allows ▁for ▁the ▁use ▁of ▁resp ir atory ▁protection ▁equipment ▁other ▁than ▁SC BA . ▁This ▁protection ▁includes ▁any ▁of ▁the ▁various ▁types ▁of ▁air - pur ifying ▁resp ir ators . ▁C rew ▁members ▁should ▁not ▁use ▁this ▁level ▁of ▁protection ▁unless ▁the ▁specific ▁ha z ard ous ▁material ▁is ▁known ▁and ▁its ▁concentration ▁can ▁be ▁measured . ▁Level ▁C ▁equipment ▁does ▁not ▁offer ▁the ▁protection ▁needed ▁in ▁an ▁o xygen ▁def ic ient ▁atmosphere . ▁Level ▁D ▁Level ▁D ▁protection ▁does ▁not ▁protect ▁the ▁crew ▁member ▁from ▁chemical ▁expos ure . ▁Therefore , ▁this ▁level ▁of ▁protection ▁can ▁only ▁be ▁used ▁in ▁situations ▁where ▁a ▁crew ▁member ▁has ▁no ▁possibility ▁of ▁contact ▁with ▁chemical s .