#4 is a contradiction that works. Often called “24 oz” duck in the trade, this weight actually measures approximately 23.5 oz/sq.yd — heavy enough to handle serious abuse, yet good-looking enough that high-end bag makers keep coming back for it. With 5-plied yarns in both directions, it has the kind of strength that earns repeat orders. Some of our longest-running customers are sailcloth manufacturers in New England — the kind who’ve been stitching canvas since before anyone called it “heritage.” They’re grumpy, they’re particular, and they’ve been ordering #4 for decades. Maybe longer. They don’t call to chat. They call to reorder. That tells you everything you need to know.
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