Day / night visibility

During the night and low light daytime conditions the reflective strips on High Viz clothing “light up” when they meet an external light source such as the headlights of a car. The light given off by the reflective tape at nights helps the wearer to be clearly seen at a distance even in pitch black conditions.

This Australian standard 4602.1.2011 refers to how a garment is constructed using fabrics compliant to 1906.4 There has to be over 0.2m2 of unbroken fluoro fabric on both the front and back of the garment in the upper torso (not including the sleeves). The fluoro must not be broken with non-fluoro fabric within the 0.2m2 area on both the front and back from the top of the shoulders to the waist and MUST encircle the body up to that measurement, so no full side panels up to the armpit level are permitted. This standard also explains the position of the retroreflective tapes on the garment and the width and quantity used. These tapes should not detract from the 0.2m2 measurement required.

Class D = Daytime use

Class N = Night time use using retroreflective material

Class D / N = Day / night use

For occupational wear by people who may be exposed to the hazard of moving traffic, moving plant or equipment in high-risk situations.

To find out more contact Embroidermark at

The information contained in this blog has been compiled and presented with all due care and attention. The reader should satisfy themselves that the information is correct by sourcing the relevant standards.

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