I recently purchased some type 1 paracord which has 100lb tensile strength from lifeviewoutdoors.com and was wondering what can you do with 550 lb cord that you can't do with 100lb cord. I need to put some in my NRA survival kit and was wondering if I should just substitue more length of 100 vs 550 which is wrapped around my Bark River PSK. I figure if I have to lash wood together for a shelter 100 would do the trick. Any ideas? Remember how small the Otter box is.