Want to know the secret to keeping your beachwear secure? A cross-back bikini of course. Sleek at the front and supported at the back, cross-back bikinis are destined to make their way into your closet. Do like the French, and keep it simple with colorful and striped cross-back bikinis by J.Crew. For a good print, AKIRA and Bleu Rod Beattie don't mess about so your bikinis always stand out.