: Used when the chemical and its concentration are known. It requires a hooded chemical-resistant suit and an Air-Purifying Respirator (APR).
: Basic workwear or coveralls used only when there is no known risk of respiratory or skin hazards. European "Types" (1–6) buy chemical suit
Protection standards vary by region, but most manufacturers use either the or European (EN) classification systems. US OSHA/EPA Levels (A–D) : Used when the chemical and its concentration are known
: Used when maximum respiratory protection is needed but skin hazards are lower (e.g., liquid splashes only, no toxic vapors). liquid splashes only