Why is 5G not one single frequency?
5G can operate in sub-6 GHz bands and, in some regions, much higher millimeter-wave bands.
What matters besides the fabric?
Seams, openings, closure design and total enclosure coverage can dominate the final result.
How should I specify the project?
Provide the exact target band, required attenuation, enclosure dimensions and opening method.
Project note: Use supplier data as a starting point. Validate the finished assembly at the relevant frequencies and environmental conditions.