an oxygen deficient atmosphere. Level D Level D protection does not protect the person from chemical exposure. Therefore, this level of protection can only be used in situations where a person has no possibility of contact with chemicals. A pair of coveralls or other work-type garment along with chemical-resistant footwear with steel toes and shanks are all that is required to qualify as Level D protection. Most firefighter turnout gear is considered to be Level D. In Europe Most suits used in Europe are covered by a set EU Norms, and divided into a total of six types (levels) of protection: Type 1: Protects against liquid and gaseous chemicals. Gas tight. (EN 943 part 1). More or less equivalent to US level A. Type 2: Protects against liquid and gaseous chemicals. Non gas tight. (EN 943 part 1). More or less equivalent to US level B.1 Type 3: Protects against liquid chemicals for a limited period. Liquid jet tight. (EN 14605) Type 4: Protects against liquid chemicals for a limited period. Liquid saturation tight. (EN 14605). More or less equivalent to US level C. Type 5: Protects against airborne dry particulates for a limited period. (EN ISO 13982-1). Type 6: Protects against a light spray of liquid chemicals (EN 13034). More or less equivalent to US level D. 1: Can be used in places where the chemical in gaseous form isn't harmful to the body exterior. GOST System In the GOST system of norms, EN 943 is equivalent to GOST 12.4.284.2-2014. In Brazil Following the American standards, there are 4 different types of suits, from A to D. The suits are known to the Brazilian military as Roupa Protetora Permeável de Combate (Protective Permeable Combat Clothing). There are within the Brazilian military several specialized hazmat regiments. The regiments were deployed during the FIFA 2014 World Cup, 2016 Summer Olympics in Rio de Janeiro, and the COVID-19 pandemic. Types Hazmat suits come in two variations: splash protection and gastight suits. The splash protection suits are designed to prevent the wearer from coming into contact with a liquid. These suits do not protect against gases or dust. Gastight suits additionally protect against gases and dust. Gas/vapor protection Such suits (level A in the US) are gas or vapor-tight, providing total encapsulation and the highest level of protection against direct and airborne chemical contact. They are typically worn with a self-contained breathing apparatus