No supply chain means that, at least in the short term, the local clothing stocks will be a major determinant of what people wear. Where I live (the northeast US), that means cheap and ubiquitous t-shirts patchworked into everything, for a start–making quilts out of a hundred thousand unneeded t-shirts. Notions (zippers, hooks, buttons etc.) will be cannibalized from worn-out clothes–even cheap zippers bring together out-of-reach precision metallurgy and polymers, and reliable YKK zippers will be sought and prized. Speaking of polymers: Patagonia and North Face and Gore-Tex outerwear will be prized heirlooms, the most valuable garments made of durable, functional and irreplaceable technical synthetics (especially needful in New England winters). No supply chains means no polymers, nor much by way of dyes (most of which are derived from petroleum), which means returning to fibres that can be grown (and grown locally, initially). Plants or animal products like wool, as well as leather (probably not black, though) and fur. This was nicely captured in Mad Max: Fury Road: the Vuvalini of Many Mothers, who gardened, wore handwoven-looking scarves and fabrics in colours consistent with vegetable dyes.