True paracord is 5mm thick ( 1/8") and has a static strength of 550 lbs or 225 Kl .True paracord will have 7 inner strands. It is the prefered cordage ( where available) for lashing and fabricating fishing line or nets from the inner strands. Any decent cordage is usefull. Natural fibers are more susceptable to environmental wear ( sunlight, abrasion, chemicals etc.) but are also usefull as tinder. Paracord will simply melt- at very hot temperatures. Using anything but dedicated line for technical climbing isn't safe. Paracord is dangerous to use for any neck carried gear.