In concept, a white swimsuit is beyond chic. In reality, they're notoriously see-through once they hit the water. Since no one wants to find out they're practically naked when wet (and it's not exactly the type of thing you can try before you buy), we did the legwork for you. We tested dozens of white womens bathing suits for style, fit, and, of course, the sheer factor. Of the nearly 100 we tested, we stand by these 10 suits and their perfect opaqueness.

• Shoulder-tie French bikini top, $44, jcrew.com;
• shrunken surf hipster bikini bottom, $40, jcrew.com

Bikini top, $18, hm.com; bottom, $13, hm.com

Double-sided bikini top, $35, cosstores.com; bottom, $25, cosstores.com

Anne Cole color-blast lingerie maillot cheap one piece swimsuits, $78, amazon.com

Antibes bikini top, $130; bottom, $130, marysia.com

Lisa Marie Fernandez Arden flounce swimsuit, $430, farfetch.com

Chloe pom-pom wrap, $90; Monique bottom, $66, lspace.com

Belize top, $108, mikoh.com; Zuma bottom, $86, mikoh.com

Mokiki one-piece, $212, bastasurf.com

Chloe Cotrast Color Cheap Bikinis Online, $79, triangl.com