: Used when maximum respiratory protection is needed but skin hazards are lower (e.g., liquid splashes only, no toxic vapors).
: Used when the chemical and its concentration are known. It requires a hooded chemical-resistant suit and an Air-Purifying Respirator (APR). 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 maximum respiratory protection is needed