If you're using a nylon longe line, ditch it for a cotton web line, which is simply safer. Nylon tends to tighten more readily if it gets wrapped or caught around something, like a fetlock or a hand. Then, if the horse panics or jerks, it won't break. The result is a deep abrasion or even a broken bone. Cotton web also doesn't kink or twist as easily as nylon, so it's easier to hold and handle. Serviceable cotton web lines start around $10, with most priced $25 to $40. Holiday Hint: This might make a great gift for your horsey friend!
The material is safer than nylon.