The most common cord used for crafting collars is Type III 550 paracord. The “550” refers to its minimum breaking strength of 550 pounds when tested under military specification. Paracord achieves this strength through two parts: • a braided nylon outer sheath • 7 inner strands that share the load When woven into knot structures like cobra or fishtail, the cord is layered multiple times, which distributes force across several strands. That’s one reason paracord is widely used in survival gear, outdoor equipment, and for animals. ALSO - as you're buying it, watch out for the fakes, especially online! So how do you spot a fake?? Inner Strand Count: ✅ Authentic 550 has exactly 7 inner strands, meeting the 550 lb breaking strength ❌ Fake has fewer strands (2-5), significantly decreasing its breaking strength (150-300 lbs) The "Burn Test" ✅ Authentic melts & turns clear, then caramelizes ❌ Fake burns black, sooty smoke, and gets brittle (like burnt plastic) Material & Structure: ✅ Authentic is 100% nylon, tightly woven, consistent sheath ❌ Fake often uses polyester, is less durable, and less flexible or is looser Price: ✅ Authentic will cost a bit more, but still reasonably priced ❌ Fakes are extremely cheap I highly recommend avoiding cheaper options from Amazon, Temu, Ali Express, and other big online mass retailers. You can get real, USA made and distributed paracord 550 from my shop here. If you're looking for specific colors or want to buy larger spools, my trusted supplier is TJ's Paracord, located in Ohio, USA. I don't get any kickback from promoting his company. I just really trust him & his product. It's legit! Happy Crafting! ~Ashley