Vitamin A by Amahalia Stevens is hands down our most requested swimwear line year after year. Known for great cuts in stunning colors, Stevens creates bikinis that perfectly marry ultra-skimpy Brazilian styles with more conservative American tastes. The luxurious Italian tricot fabric that Stevens employs has a 4 way stretch system that hugs every curve just right (and provides a little support up top, too). Some pieces in this collection are even reversible, adding chic versatility to this fantastic So Cal inspired line. Very popular with celebrity tastemakers, we've spotted Vitamin A swimwear on Sienna Miller, Jennifer Aniston, Cameron Diaz, and many more.