This Is The World's Strongest Fiber,

and it is now being made,

 into a anorake or 'puffer' jacket as they are sometimes known, the fiber is dyneema, 

from Designboom: the puffer jacket is considered to be fifteen times stronger than steel, Dyneema is most commonly used for heavy duty jobs, such as tethering satellites from space or mooring giant container ships, unlike other puffer jackets on the market, the ‘indestructible’ coat can also serve as a protective armor, as it endures extreme damage tests, such as knife slashing and tearing,

besides the ultra-durable fabric that integrates dyneema, the jacket also features military-grade belt tape, zippers, elasticated drawcord adjusters and other details that will last for years,

a real hand me down jacket, photographs by Vollebak, priced at £795 and looking at the above video, with today's epidemic of knife crime this jacket could be a real lifesaver.