Kevlar String

If they ever figure out how to make a

 Batman grappling hook

that retracts and can pull you up, 

this is the cord they will use for it,

or Spiderweb Silk, 

apparently that stuff is REALLY strong,

 like a strand the size of a pencil can hold a car!

But it's REALLY expensive, Kevlar isn't, so...

Kevlar Survival Cord

$6.99 for 25ft. 

Be Prepared for Anything

• Great for the outdoors, on this planet or another
• Strong! 25' long, 200 pound breaking strength
• Look like you'll steal yourself some adventure

Kevlar survival cord makes a great addition to any survival geek's arsenal. Need to tie something down (or someone up)? Works for that. Stranded on a hostile alien planet and need to make a bow? Done. Going out to the woods or cosplaying at a convention? You’ll look like you’re prepared for anything...even if the only merit badge you have is in Twitter.
This 25 feet of cord is as thin as thread -- great for you apocalypse-minded knitters! -- and has a breaking strength of 200 pounds. It’ll withstand extreme temperatures and is flame-resistant, even the heat of a forum flame war.
Product Specifications

• Twenty five feet of 200 lb test survival cord (for you, not them)
• Blue Polyurethane coating: UV resistance and help against abrasion
• Loads of uses in household, cubicle wars, or the great outdoors