High-visibility clothing is a system: fluorescent background for day, retroreflective bands for night, and enough of both, in the right places, to put the wearer in a class. EN ISO 20471 is the European name buyers put on that system. A pretty silver tape on a navy jacket is a fashion trim. It is not a Class 3 garment.
Hi-vis bands and transfers are accessory materials on a growing platform. TrimGem University teaches EN ISO 20471 next to retroreflective tapes because a one-stop Guangzhou desk samples the trim pack that sits in the design. The catalogue will keep adding fluorescent and bead constructions; class is still a garment measurement.
Terms the standard actually uses
- Fluorescent material — absorbs and re-emits visible light; the yellow / orange-red ground you see at dusk.
- Background material — that fluorescent area.
- Retroreflective material — returns lamp light (bead or prism tape).
- Combined-performance material — fluorescent and retroreflective in one textile.
Class is about minimum areas (square metres), not about how bright a swatch looks on a desk:
| Class | Background (m²) | Retroreflective (m²) |
|---|---|---|
| 3 | 0.80 | 0.20 |
| 2 | 0.50 | 0.13 |
| 1 | 0.14 | 0.10 |
Class 3 must cover the torso and add sleeved or full-leg bands. Class 3 is more conspicuous than 2, which is more conspicuous than 1 — in the standard’s own ranking.
Layout rules buyers miss
360° visibility: fluorescent and retroreflective materials should encircle torso, sleeves and legs as the garment type requires. Retroreflective band width ≥ 50 mm. Horizontal torso bands: gaps and angles limited; lower band a stated distance above the hem. If a sleeve hides a torso band, the sleeve itself needs bands (two on a long sleeve, spaced). Trouser legs: two or more encircling bands per leg.
US ANSI/ISEA 107 follows the same idea (fluorescent area, retroreflective performance, garment class) with its own tables. Do not mix class numbers across the two documents on one tech pack.
Workwear versus sport
Road, rail, waste, airport: Class 2 or 3, fluorescent yellow or orange-red plus silver bands. Wash decay is in the standard: performance after the claimed cleaning cycles (default talk is a small number of cycles if none is declared). Sport night-run kit wants stretch, perforation and transfer film — still 360° if you are selling conspicuity, but often not a certified 20471 garment. Say so.
Certification is of the clothing, after abrasion, flex, cold fold and rainfall on the retroreflective material as required. A tape mill’s report is an input.
Combined-performance materials (fluorescent and retroreflective in one textile) can reduce bulk, but they still have to meet both sets of requirements. Do not use a fashion reflective print to “make up” missing background square metres.
If the garment is sold as PPE, the class and the max wash cycles belong on the label. If it is sold as a running jacket with reflective hits, say that — do not print 20471 Class 3 on the hangtag.
TrimGem will supply bands and transfers that can sit in a 20471 design. We will not class a jacket from a tape swatch.