Category I: Simple products Products which are not suitable to protect against any form of hazard. Category II: Intermediate products Products which fall neither into categories I nor III. Category III: Complex products Products which are worn or held in order to protect against any hazard which may be life threatening. For the purposes of protective clothes Types of protection are identified as:

	Type 1 prEN 943 : 1995 Gas tight suits. Suits which are intrinsically sealed against the environment.
	Type 2 prEN 943 : 1995 Non-gas tight suits Suits which retain a positive internal pressure to prevent ingress of dusts, liquids or vapours
	Type 3 EN 1511 : 1994 Liquid tight suits Suits which can protect against strong and directional jets of a liquid chemical such as spray from a burst pipe under pressure. Requires a barrier fabric (chemical tests to EN369 Permeation test) and sealed seams.
	Type 4 EN 1512 : 1993 Spray tight suits Suits which can protect against saturation of liquid chemical, where volume of the liquid builds up on the suit forming pools, resulting in rivulets. Requires a barrier fabric (chemical tests to EN369 Permeation test) and sealed seams.
	Type 5 prEN 13982-1/2 Dry particle suits Suits for protection against hazardous dusts and any dry particles.
	Type 6 prEN 13634 Reduced spray suits Suits for protection against light spray and splashes of liquid chemicals where there is no directional spray or build up of liquid on the suit, but there may be a fine mist of droplets in the atmosphere.
	Anti-static EN1149.1 Maximum surface resistivity of 5x1010 OHMS.
	Radioactive contamination EN 1073-2 Class 1 Protection against radioactive contamination.