ISO 20471

{{One source| date = February 2018}}

{{Infobox technology standard

| title = ISO 20471:2013

| long_name = High visibility clothing — Test methods and requirements

| image = File:High-visibility vest standard tag - EU-ISO, USA, Australia.jpg

| image_size = 150px

| alt = A tag on a high visibility vest, identifying it as complying with ISO 20471:2013

| caption = A standards tag on a high visibility vest

| abbreviation = ISO 20471

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| first_published = {{Start date and age|2013|03|df=y}}

| version = 1

| version_date = 2013

| preview =

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| organization = International Organization for Standardization

| committee = ISO/TC 94/SC 13 - Protective clothing

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| related_standards = * ANSI/ISEA 107-2020 (USA)

• AS/NZS 4602.1:2011 (Australia/New Zealand)
• CSA Z96-15 (2020) (Canada)
• JIS T 8127:2020 (Japan)

| domain = high visibility clothing design and certification

| license =

| copyright =

| website = {{URL|https://www.iso.org/standard/42816.html}}

}}

ISO 20471 is an International Organization for Standardization technical standard describing requirements for high-visibility clothing, along with methods for testing and confirming that clothing meets those requirements.{{Cite web|url=https://www.iso.org/standard/42816.html|title=ISO 20471:2013 - High visibility clothing -- Test methods and requirements|website=www.iso.org|language=en|access-date=2018-02-12}}{{cite web|url=https://issuu.com/zhoufeiqi/docs/bs_en_iso_20471-2013 |title=EN ISO 20471:2013 High visibility clothing -- Test methods and requirements |publisher=issuu.com |date=2016 |accessdate=2019-05-19}} The standard was reviewed in 2018 and undergoing its routine 5 year review in 2023.