Durable nylon and polyester combination rope won't rot or decay due to age and moisture. 2.5 mm rope provides increased strength and workability over 2mm, without the bulk and pack weight of 3mm-4mm paracord. Ultra-light (only 2 grams each - 18mm diameter) aluminum line tighteners help secure your tent, lean-to, tarp or rain fly in high winds, rain, snow or just a beautiful sunny day. Five-strand inner rope core can be deconstructed for use in a variety of situations. Convenient zip top product packaging is reusable for secure and dry storage of your guy lines when not in use.