"Not terribly, but I can explain, anyway. Wool is like fur, like-- like this, only thicker and softer and longer." He frees one hand from his fishing pole to ruffle his own hair. "It comes from an animal called a sheep. Cotton is the same except it comes from a plant. You take the wool or the cotton and you roll it, spin it, using a little thing called a drop spindle-- I would show it to you but I don't have it with me. I can show you later. But when you roll it tightly enough, it turns into thread. Like this." Now he touched the fishing line, which admittedly is not thread but at least looks like it. "Then I use the thread to stitch clothes together, tie them together kind of, or weave the threads together to make new fabric-- though I don't actually have the tools to weave here."

Jack has the gift of the gab, sorry Heat. Also he knows Serph would always prefer to have things explained, so hopefully Heat is the same.