What extra issues matter?
Biocompatibility, nickel sensitivity, abrasion, sweat, washing, comfort and applicable regulations.
Is nickel-plated fabric suitable for everyone?
Nickel can be a sensitizer, so prolonged direct skin contact requires careful review.
What should be validated?
The actual finished product, not only the raw conductive textile.
Project note: Use supplier data as a starting point. Validate the finished assembly at the relevant frequencies and environmental conditions.