ISO/FDIS 25243

• Abstract:

  Environmental test method of repeated pressurization underwater for smart textiles systems.

• Status: Not Published
• ICS: 59.080.80 - Smart textiles
• Technical Committee: ISO/TC 38 - Textiles
• Drafting Committee: ISO/TC 38/WG 32 - Smart textiles
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 21-Aug-2026
• Completion Date: 21-Aug-2026

Overview

ISO/FDIS 25243:2026 sets out an international test method for assessing the performance and durability of smart textile systems under repeated underwater pressurization. Developed by ISO Technical Committee 38 (Textiles), this standard addresses the unique challenges e-textiles face when exposed to underwater environments with high pressure loads. Growing applications of smart and e-textiles in sectors such as diving gear, protective clothing, and wearable sensors make reliable test methods essential for both manufacturers and end users.

This document specifies the procedures, apparatus, and reporting criteria necessary to determine whether smart textile systems can maintain operational integrity and effectiveness after repeated cycles of underwater pressurization.

Keywords: smart textiles, underwater pressurization, ISO 25243, e-textiles, durability testing, textile standards

Key Topics

• Purpose: Evaluates the ability of smart textile systems to operate effectively after simulated real-world underwater pressure exposure.
• Scope: Focuses on repeated underwater pressurization, essential for textiles designed for harsh or submerged environments.
• Test Specimen Preparation:
  • Requires conditioning in standard atmospheric conditions per ISO 139.
  • Three specimens tested to ensure reliable results.
• Apparatus:
  • Utilizes immersion tanks compliant with EN 14225-1.
  • Pressure settings of at least 6 bar simulate demanding underwater scenarios.
• Test Procedure:
  • Measurement of initial run-time under standard conditions.
  • Execution of ten continuous pressure cycles simulating realistic underwater stresses.
  • Post-test drying according to ISO 6330, followed by finished run-time measurements.
  • Calculation of performance efficiency based on rate of run-time change after testing.
• Reporting:
  • Mandates thorough documentation, including test conditions, results, and any deviations or observations.

Applications

ISO/FDIS 25243:2026 provides vital guidance for developers, manufacturers, and quality assurance professionals involved in the production and evaluation of smart textile systems intended for underwater or high-humidity environments. Key application areas include:

• Diving Suits and Gear: Validates durability for smart functions integrated into wetsuits, drysuits, or diving accessories.
• Protective and Industrial Textiles: Supports innovation in workwear or protective gear designed to monitor conditions or send alerts even when submerged.
• Wearable Medical and Sports Devices: Ensures reliability for biometric sensors and monitors used in aquatic sports or therapeutic environments.
• Consumer Electronics Embedded in Textiles: Assures consumers and stakeholders that wearable technology-such as fitness trackers in swimwear-remains functional following underwater use.

Adhering to this standard helps organizations demonstrate compliance, enhance product reliability, and improve safety and customer confidence.

Related Standards

To achieve a comprehensive approach to testing and durability evaluation, ISO/FDIS 25243:2026 refers to and complements several other international standards:

• ISO 139: Textiles - Standard atmospheres for conditioning and testing, essential for test sample preparation and result consistency.
• ISO 6330: Textiles - Domestic washing and drying procedures for textile testing, referenced for post-immersion drying methods.
• EN 14225-1: Diving suits - Requirements and test methods, providing the framework for immersion tank specifications and procedures.
• ISO/TR 23383:2020: Definitions and categorization of smart (intelligent) textiles, offering foundational terminology and classification guidance.

Implementing ISO/FDIS 25243 within a product testing strategy promotes interoperability, product quality, and regulatory alignment across the smart textiles sector.

FINAL DRAFT
International
Standard
ISO/TC 38
Textiles — Smart textiles systems
Secretariat: SAC
— Test method for repeated
Voting begins on:
underwater pressurization
2026-08-21
Textiles — Systèmes de textiles intelligents — Méthode d'essai de
Voting terminates on:
pressurisation répétée en immersion
2026-10-16
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
FINAL DRAFT
International
Standard
ISO/TC 38
Textiles — Smart textiles systems
Secretariat: SAC
— Test method for repeated
Voting begins on:
underwater pressurization
Textiles — Systèmes de textiles intelligents — Méthode d'essai de
Voting terminates on:
pressurisation répétée en immersion
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 2026
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
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 2
4.1 Immersion tank.2
5 General requirements . 2
6 Test procedure . 2
6.1 Sampling and preparation of test specimen .2
6.2 Initial run-time measurement .2
6.3 Durability test .2
6.4 Finished run-time measurement.3
6.4.1 Drying procedure .3
6.4.2 Finished run-time measurement .3
6.5 Rate of change .3
7 Test report . 3
Bibliography . 4

iii
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 documents 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 pa
...

ISO/DISFDIS 25243:2026(en)
ISO/TC 38
Secretariat: SAC
Date: 2026-08-07-20
Textiles — Smart textiles systems — Test method for repeated
underwater pressurization
Textiles — Systèmes de textiles intelligents — Méthode d'essai de pressurisation répétée en immersion
FDIS stage
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,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 2
4.1 Immersion tank . 2
5 General requirements . 2
6 Test procedure . 2
6.1 Sampling and preparation of test specimen . 2
6.2 Initial run-time measurement . 2
6.3 Durability test . 2
6.4 Finished run-time measurement . 3
6.5 Rate of change . 3
7 Test report . 3
Bibliography . 4

iii
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 documents 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).
Field Code Changed
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.
Field Code Changed
This document was prepared by Technical Committee ISO/TC 38, Textiles.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
E-textiles (smart textiles) are increasingly being used in applications involvi
...