army
bio
biohazard
biological
breathe
caution
chemical
concept
contour
danger
defense
design
element
equipment
filter
flat
front view
gas
headgear
helmet
icon
lab
life
mask
military
modern
pictogram
protection
protective
red
respirator
safe
safety
scalable
security
sign
silhouette
stencil
symbol
threat
toxic
toxicant
toxicity
two
virus
war