On 16 March 2023 the International Electrotechnical Commission (IEC) published IEC 63203-204-1:2023, Wearable electronic devices and technologies - Part 204-1: Electronic textiles - Test method for assessing the washability of e-textile products. The standard is available as the IEC 63203-204-1:2023 RLV, which contains the international standard together with its redline version showing all the technical content changes compared with the previous edition.

IEC 63203-204-1:2023 specifies a test method for the washability of e-textile products in domestic washing. The standard includes test procedures for e-textile products with conductive parts and sensors that collect user data. It does not include test methods for safety or heating, and does not cover products containing components other than those listed in the clause.

Compared with the previous edition, this second edition introduces the following significant technical changes:
a) subclause 3.2 on conductive textiles has been deleted;
b) subclause 3.3 on casual wear and sportswear has been deleted;
c) subclause 3.2 on washing procedures has been added;
d) Figure 1 has been updated;
e) in 4.1, an optional measurement of the conductive tracks has been added to the checklist before the washability test;
f) the checklist in clause 6 has been supplemented.