Boyshort Swimsuit Bottom Black Boston Proper Supima® cotton isn't just softer—it's

Supima® cotton isn't just softer—it's smarter

One of our most sought-after styles for a reason

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Our new High Rise V-Thong is like the World’s Most Comfortable Thong® (aka the Original Rise Thong) but with an ultra-high rise V-front

And utterly sophisticated when worn on its own

Boyshort Swimsuit Bottom Black Boston Proper Supima® cotton isn't just softer—it'sReady to swim in something made with lifes waves in mind? Now you can, in more of our best selling underwear styles, now translated into Swim! Our Boyshort Swim Bottom features everything you love about this staple silhouette, but beach ready. Double lined and made with supportive, recycled fabric that stretches to fit you, its designed for the confidence that comes with feeling good in your skin.