Why do suppliers refuse to quote before seeing a tech pack?

Because a jacket's price lives in details a photo cannot show. Fabric composition and weight, membrane type, trim count, zipper brands, stitch density, seam taping, embroidery stitch counts — each shifts the cost meaningfully. A supplier who quotes from a picture is guessing, and a guess that later becomes a firm price is how disputes start.

Two ways buyers can work with this: first, supply even a minimal spec (fabric target, feature list, target weight) and accept a quoted range as provisional; second, send a reference sample for the factory to cost against. At UniOuter, a full cost-breakdown quotation covering fabric, trims, labour, printing/embroidery, quality inspection, packaging and domestic logistics is issued once the specification is confirmed — that breakdown is what makes the number defensible on both sides.