Graphene is a variant (allotrope) of carbon. It can be manufactured in several ways and it is a natural part of graphite. This special material including the following unique features:

Thin – only one atom thick (therefore "two-dimensional")
Lightweight – a sheet of one square meter weighs less than 1 mg
Hard – harder than diamond
Strong – 200-300 times stronger than steel
Impervious – comes in both solid, gas and liquid
Conductive – better electrical conductivity than copper
Transparent – let through most wavelengths of light
Bendable – can adopt any shape

Graphene layer