Celebrities like Emily Ratajkowski, Hailey Baldwin and Ashley Graham have all been photographed making a splash in a red one-piece.
Glamour magazine's Jessica Radloff says the high-cut swimwear is also figure flattering.
“Red is a universal color that works great on everybody," she told Inside Edition. "It's bright. It's sexy. It elongates your legs because the torso is high cut so everyone looks great in it.”
Inside Edition models rocked the retro swimwear first made famous in the 90s on the hit TV show Baywatch.
While the trendy swimsuits are a throwback to the days when our favorite TV lifeguards patrolled the beach, many have a modern flair.
One swimsuit has a deep plunging neckline with a "peek-a-boo" front.
On another, the sexy cutouts are on the sides.
Another suit comes with a revealing zipper and long sleeves.
So if you want to sizzle on the sand this summer, think one-piece in red.
“People think if you want to be sexy wear a two-piece," Radloff said. "That cannot be further [from] the truth because this one piece is so flattering."