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Canvas Material: Pick the Right Weight and Duck Grade for Makers Canvas is a plain-woven, heavy-duty fabric traditionally made from cotton, linen, or hemp, prized for its durability and resistance to tearing. It’s woven tighter and denser than most everyday fabrics, which is why it shows up in sails, tents, tote bags, and stretched painting supports. Modern versions sometimes swap synthetic fibers in or get coated with PVC for extra weatherproofing. TL;DR: Heavier canvas (15 oz/yd² and above) provides better puncture and abrasion resistance, making it ideal for outdoor covers, tarps, and u …