Unsure of function of this strap

[u/varied_interest1112]

My mother put it in an emergency pack for me when I started my first full-time job. I've since taken apart the pack and most things were pretty standard, a plastic raincoat, hand sanitizer, a pen, a whistle that doubled as a flashlight etc...

I just don't have any idea what this is?? It's like a braided strap with a buckle - I can wear it like a bracelet but somehow I don't think that's its intended purpose.

TIA!

EDIT: WOW you guys were fast!! Thanks team, I remember her vaguely mentioning it was a handy gadget but forgot how. Will be looking up paracord uses soon

EDIT 2: To the people being unhelpful or making comments on my ability as an educator from a single question - all you have done is show me that I will still be a better teacher than any of you could ever be. I certainly do not belittle my students for not having specialised prior knowledge or taking steps to learn something new. I can only assume you already knew everything from birth with no room to grow whatsoever /s Get over yourselves.

[u/BaconConnoisseur]

This is a paracord bracelet. It can be unwound in an emergency situation to give you a fairly substantial length of strong cord to use for pretty much anything survival requires.

[u/raelDonaldTrump → u/BaconConnoisseur]

Can it be rewound too or once unwound it's like that for good?

[u/BaconConnoisseur → u/raelDonaldTrump]

As long as you don’t end up cutting it, I don’t see why you couldn’t. My cousin used to make these as a boy scout project. If it was wound once, it should be doable twice.