A reversible bikini is essentially two suits in one, freeing up your carry-on for other warm-weather essentials. About MaajiMaaji was dreamed up by Manuela and Amalia Sierra, two sisters with a family history of entrepreneurship and a passion to contribute to Colombia's social development. Known for avant-garde combinations and print mixing in modern silhouettes, they've recently turned their attention to a color-drenched collection of studio and beach wear that looks as good as it performs.