Bronze

The Victorians depreciated the technical knowledge of earlier cultures, and this prejudice continues.
See for example the tone of :

When University of Cincinnati researchers uncovered the tomb of a Bronze Age warrior—left untouched for more than 3,500 years and packed with a spectacular array of precious jewelry, weapons and riches—the discovery was hailed by experts as "the find of a lifetime."

Read more at: http://phys.org/news/2016-10-lord-rare-discovery-bronze-age.html#jCp

The find tells us that Bronze Age craftsmen producing luxury goods had access to excellent tools, and had deep skills.  We can expect  their craftsmen producing textiles to have similar access to excellent tools and skills.

Nobody wears fine jewelry with a gunny sack.  A culture that produces fine personal adornment does not neglect textiles.