Why choosing Hynaut Graphene Reinforced Condoms? Graphene,also called”black gold” is a very stable hexagonal honeycomb-like flat film. The largest gap of perm is about 5000 nm wide, while the gap pf latex moleculaes is about 500 nm. Latex Condoms can effectively prevent pregnancy, but there’s risks of virus infection. Graphene can fill up the gaps between latex molecules,and the extremely small gap of 20 nm can significantly enhance the resistance against virus infection.