Spider Silk

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A material produced by most spiders which has higher tensile strength than steel, and is equal to that of commercial polyaramid filaments—e.g., Twaron or Kevlar. It is extremely lightweight and ductile, can stretch up to 140% of its length without breaking and holds its strength to -40ºC
Composition Complex proteins rich in alternating glycine and alanine, or alanine alone, that self-assemble into a beta sheet conformation
References in periodicals archive ?
They genetically engineered goats to produce milk, which is packed with the same protein as silk spiders, which is then milked out and spun and weaved into a material that is ten times stronger than steel.
The silk spiders spin to make webs is one of the toughest materials on Earth.
The silk spiders use to weave webs is liquid but hardens on contact with air.