Beach or poolside packing should be easy, right? All you need is a bathing suit. Wrong. So wrong. You need the right bathing suit, or as the case may have it for the unpredictability of a weekend out East, suits. What you need for a day of lounging at the Beach Club at Gurney’s isn’t quite the same for a more adventurous afternoon with Hampton Flyboard. So, let us introduce to you sisters and co-founders of Aurora San, Natasha San and Gemma Sherman.