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Kevlar is the DuPont Company's brand name for a particularly light but very strong synthetic fiber. Created in DuPont's labs in 1975 by Stephanie Kwolek and Herbert Blades[1], Kevlar was first used commercially in the early 1980s. It can be spun into ropes or sheets of fabric that can either be used as-is, or used in the construction of composite components. Kevlar is now used in a wide range of applications, from bicycles to body armor, due to its high strength-to-weight ratio, "...5 times stronger than steel on an equal weight basis...".[1] Under water, Kevlar can be 20 times as strong as steel. [2] It is a member of the Aramid family of synthetic fibres and a competitor of Twaron manufactured by Teijin.