ISO 11999-9

PPE for firefighters — Test methods and requirements for PPE used by firefighters who are at risk of exposure to high levels of heat and/or flame while fighting fires occurring in structures — Part 9: Fire hoods

ISO 11999-9:2016 specifies the minimum design and performance requirements for a fire hood as part of personal protective equipment (PPE) to be used by firefighters, primarily but not solely to protect against exposure to flame and high thermal loads.

Équipement·de·protection·personnelle·pour·pompiers — Méthodes·d'essai·et·exigences·pour·les·équipements de protection personnelle utilisés par les pompiers qui sont à risque d'une exposition à des niveaux élevés de chaleur et/ou de flamme quand la lutte contre les incendies survient dans les structures — Partie 9: Cagoules

General Information

• Status: Not Published
• ICS: 13.340.20 - Head protective equipment
• Technical Committee: ISO/TC 94/SC 14 - Firefighters' personal equipment
• Drafting Committee: ISO/TC 94/SC 14 - Firefighters' personal equipment
• Current Stage: 6000 - International Standard under publication
• Start Date: 29-Mar-2025
• Completion Date: 29-Mar-2025

Relations

• Revises: ISO 11999-9:2016 - PPE for firefighters — Test methods and requirements for PPE used by firefighters who are at risk of exposure to high levels of heat and/or flame while fighting fires occurring in structures — Part 9: Fire hoods
• Effective Date: 24-Sep-2022

Standards Content (Sample)

FINAL DRAFT
International
Standard
ISO/FDIS 11999-9
ISO/TC 94/SC 14
PPE for firefighters — Test methods
Secretariat: SA
and requirements for PPE used
Voting begins on:
by firefighters who are at risk of
2025-01-31
exposure to high levels of heat
Voting terminates on:
and/or flame while fighting fires
2025-03-28
occurring in structures —
Part 9:
Firehoods
Équipement de protection personnelle pour pompiers —
Méthodes d'essai et exigences pour les équipements de protection
personnelle utilisés par les pompiers qui sont à risque d'une
exposition à des niveaux élevés de chaleur et/ou de flamme quand
la lutte contre les incendies survient dans les structures —
Partie 9: Hottes de feu
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 11999-9:2025(en) © ISO 2025

FINAL DRAFT
ISO/FDIS 11999-9:2025(en)
International
Standard
ISO/FDIS 11999-9
ISO/TC 94/SC 14
PPE for firefighters — Test methods
Secretariat: SA
and requirements for PPE used
Voting begins on:
by firefighters who are at risk of
exposure to high levels of heat
Voting terminates on:
and/or flame while fighting fires
occurring in structures —
Part 9:
Firehoods
Équipement de protection personnelle pour pompiers —
Méthodes d'essai et exigences pour les équipements de protection
personnelle utilisés par les pompiers qui sont à risque d'une
exposition à des niveaux élevés de chaleur et/ou de flamme quand
la lutte contre les incendies survient dans les structures —
Partie 9: Hottes de feu
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 11999-9:2025(en) © ISO 2025

ii
ISO/FDIS 11999-9:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General design requirements . 2
4.1 General .2
4.2 Innocuousness .3
4.3 Flexibility.3
4.4 Facial opening . .3
4.5 Yoke interface area .3
4.6 Sizing .3
4.7 Labels .3
4.8 Seam construction .3
4.9 Particulate protection .3
5 Sampling and pre-treatment . . 4
6 Performance requirements . . 5
6.1 General .5
6.2 Limited flame spread .5
6.2.1 General .5
6.2.2 Flame resistance (surface ignition) .5
6.2.3 Flame resistance (bottom edge) .6
6.3 Heat resistance .7
6.4 Heat transfer (flame exposure) .7
6.5 Heat transfer (radiant exposure) .7
6.6 Heat transfer (combined flame and radiant exposure) .7
6.7 Residual strength of material following radiant heat exposure .8
6.8 Seam bursting strength .8
6.9 Dimensional change .8
6.10 Thread heat resistance.8
6.11 Particulate protection .8
6.12 Water vapour resistance (optional) .8
7 Complete fire hood test - opening size retention test . 9
8 Report . 9
9 Compatibility . 9
10 Marking . . 9
11 Information supplied by manufacturer . 9
Annex A (normative) Donning, doffing and shape retention test .10
Annex B (normative) Particulate test .11
Annex C (normative) Determination of property values .12
Annex D (normative) Uncertainty of measurement .13
Bibliography .15

iii
ISO/FDIS 11999-9:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 94, Personal safety — Protective clothing and
equipment, Subcommittee SC 14, Fire-fighters' personal equipment.
This second edition cancels and replaces the first edition (ISO 11999-9:2016), which has been technically
revised.
The main changes are as follows:
— the design requirement have been amended and added to (particulate protection)
— all the heat and flame properties have been brought to amended single levels (see Table 1);
— all the mechanical properties have been brought to amended single levels (see Table 1);
— additional tests have been added or changed (including resistance evaporative transfer (RET), size
retention)
A list of all parts in the ISO 11999 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies
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ISO/FDIS 11999-9:2025(en)
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ISO/TC94/SC14TC 94/SC 14
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Secretariat: SA
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PPE for firefighters — Test methods and requirements for PPE used
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by firefighters who are at risk of exposure to high levels of heat
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and/or flame while fighting fires occurring in structures – Part 9: Fire Style Definition
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hoods —
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Part 9:
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Firehoods
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Équipement· de· protection· personnelle· pour· pompiers·— — Méthodes· d'essai· et· exigences· pour· les·
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équipements· de· protection· personnelle· utilisés· par· les· pompiers· qui· sont· à· risque· d'une· exposition· à·
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des· niveaux· élevés· de· chaleur· et/ou· de· flamme· quand· la· lutte· contre· les· incendies· survient· dans· les·
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structures – — .
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Partie 9 : Cagoules 9: Hottes de feu
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ISO/FDIS 11999-9:20242025(en)
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Commented [eXtyles1]: The reference "ISO 2024" is to a
withdrawn standard
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
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or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
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at the address below or ISO’s member body in the country of the requester.
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0 pt, No page break before, Adjust space between Latin and
ISO copyright office
Asian text, Adjust space between Asian text and numbers
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11 Formatted: French (France)
EmailE-mail: [e-mail]
Formatted: French (France)
Website: www.iso.orgwww.iso.org
Formatted: French (France)
Published in Switzerland
Formatted: FooterPageRomanNumber
ii © ISO 2023 – All rights reserved
ii
ISO/FDIS 11999-9:2025(en) Formatted: Font: 11 pt, Bold
Formatted: Font: Bold
Formatted: HeaderCentered, Left
Contents Page Formatted: Adjust space between Latin and Asian text,
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at 0.71 cm + 17.2 cm
Foreword . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General design requirements . 3
4.1 General. 3
4.2 Innocuousness . 3
4.3 Flexibility . 3
4.4 Facial opening . 3
4.5 Yoke interface area . 3
4.6 Sizing . 4
4.7 Labels . 4
4.8 Seam construction . 4
4.9 Particulate protection . 4
5 Sampling and pre-treatment . 5
6 Performance requirements . 5
6.1 General. 5
6.2 Limited flame spread . 6
6.3 Heat resistance . 8
6.4 Heat transfer (flame exposure) . 8
6.5 Heat transfer (radiant exposure) . 8
6.6 Heat transfer (combined flame and radiant exposure) . 9
6.7 Residual strength of material following radiant heat exposure . 9
6.8 Seam bursting strength. 9
6.9 Dimensional change . 9
6.10 Thread heat resistance . 9
6.11 Particulate protection . 10
6.12 Water vapour resistance (optional) . 10
7 Complete fire hood test - opening size retention test . 10
8 Report . 10
9 Compatibility . 10
10 Marking . 10
11 Information supplied by manufacturer . 11
Annex A (normative) Donning, doffing and shape retention test . 12
Annex B (normative) Particulate test . 13
Annex C (normative) Determination of property values . 14
Annex D (normative) Uncertainty of measurement . 15
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Bibliography . 17
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Foreword . 5
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stops: Not at 17.2 cm
1 Scope . 1
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2 Normative references . 1
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© ISO 2025 – All rights reserved
iii
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ISO/FDIS 11999-9:20242025(en)
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3 Terms and definitions . 2
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4 General design requirements . 3
4.1 General. 3
4.2 Innocuousness . 3
4.3 Flexibility . 3
4.4 Facial opening . 3
4.5 Yoke interface area . 3
4.6 Sizing . 3
4.7 Labels . 4
4.8 Seam construction . 4
4.9 Particulate protection . 4
5 Sampling and pre-treatment . 4
6 Performance requirements . 5
6.1 General. 5
6.2 Limited flame spread . 6
6.2.1 General. 6
6.2.2 Flame resistance (surface ignition) . 6
6.2.3 Flame resistance (bottom edge) . 7
6.3 Heat resistance . 7
6.4 Heat transfer (flame exposure) . 7
6.5 Heat transfer (radiant exposure) . 8
6.6 Heat transfer (combined flame and radiant exposure) . 8
6.7 Residual strength of material following radiant heat exposure . 8
6.8 Seam bursting strength. 8
6.9 Dimensional change .
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