Within each type, the efficacy against different chemicals, microbes, and mechanical strength varies depending on the structure of the clothing and material properties. There are six basic types of protective clothing against chemical and microbiological hazards: 1) gas-tight, 2) air-fed non-gas-tight suits, 3) suits against pressurised liquids, 4) suits against sprayed liquids, 5) suits against solid particles, and 6) suits offering limited protective performance against liquid chemicals.