 Heim 's atome was more attuned to the sense of propriety of the 1940s and a bigger hit than Réard 's design but Réard 's was the design that won the public 's imagination over time . Though Heim 's design was the first worn on the beach and sold more swimsuits , it was Réard 's description of the two @-@ piece swimsuit as a bikini that stuck . Modern bikinis were first made of cotton and jersey . 
