Blankets collectively or the making and selling of blankets as a trade or craft.
From blanket (named after Thomas Blanquet, a Flemish weaver) + -ry (suffix denoting a craft, practice, or place). The suffix -ry comes from Old French and creates nouns indicating a profession or collection of items.
It's wild that a product could become so named after one person's reputation that 500+ years later we still use his surname—but Thomas Blanquet was so famous for quality woolen cloth in the 1300s that his name stuck to the product itself, making 'blanketry' a lasting tribute to medieval brand power.
Complete word intelligence in one call. Free tier — 50 lookups/day.