Here is some info and some links (bottom of page) on paracord and its uses. There are many uses for this kind of rope, the best for kits and survival in my opinion. Its uses are limited to your imagination, however remember that this rope should NOT be used for climbing.
In the photo on the left you can see Orange, White and Green Parachute Cord (Note the Colored Strand)
There exists an 8 inner strand version instead of the standard 7 inner strand version, both rated as 550 paracord. I suggest you get the standard 7 instead of the 8. Also, some paracord will have the same colored inner strands (all white), whereas at other times you'll see one strand among the 7 with another color (darker). Some are designated as Commercial Grade and others as MIL-C-5040 Type III.
There are knock offs out there so beware! Go with the MIL-C-5040 Type III and you
are certain to be alright, do your homework. At Best Glide they show you
a certificate of compliance to show you its validity. There are other reputable stores where you can get military grade paracord and that may offer more competitive pricing.
Be certain to have look at the Modern Cordage page for more important information on paracord, as well as bankline cord which is increasing in popularity.
The 7 inner strands “split” into 21 given the design, because each strand has three cords to make one, at least on my paracord.
Elsewhere I have seen it mentioned that it splits into 14 (7 x 2) but I checked and its 21 total (7 x 3). Even the 3 are made up of finer fibers. Then you have the outer sheath on top of that.
You cannot beat paracord for a survival kit given its strength and versatility.
In the photo above I pulled one strand out, and as you can see there are three strands in it, each composed of finer material.
are many places that you can purchase quality paracord, so look around
and check out the different prices as well.
EmergencyPortal.ca – Modern Cordage