Swimsuits designed in Farmingdale are showing up on the medal podium at the Summer Olympics in Rio de Janeiro.

TYR Sport Inc., based in Seal Beach, California, designs and markets its swim and triathlon suits from Long Island, a spokeswoman said.

Several U.S. swimmers, including medalists Lily King, Dana Vollmer, Cody Miller and Jimmy Feigen, wore TYR suits in competition.

The company was founded 31 years ago by Steve Furniss, a 1972 bronze medal-winning swimmer, and current owner Joseph DiLorenzo. Though the company is based in California, 100 of its 175 employees are stationed on Long Island, where the marketing, sales, design and management teams, including chief executive Matt DiLorenzo, are based. The suits are manufactured in several countries.

“We’ve been making these high-level swimsuits for about 20 years,” Matt DiLorenzo said in an interview Friday.

He said performance swimwear used by competitive athletes accounts for about 10 percent to 15 percent of sales.

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But DiLorenzo said that the industry “had to take a few steps back” in 2010 when the Federation Internationale de Natation, the international governing body of swimming, banned polyurethane-based swimsuits.

FINA’s ban followed the 2008 Beijing Olympics when scores of swimming records fell as men and women adopted full-torso and full-body suits that were nonpermeable and gave swimmers reduced drag and extra buoyancy.

Revised rules require that swimsuits be permeable to water and contain no polyurethane. Men’s suits cannot extend below the knee or above the navel. Women’s suits cannot go above the shoulder or below the knee.

TYR suits also will be worn by some U.S. Olympic triathletes, who typically wear the garments for all three legs of the running, cycling and swimming event. The men’s individual triathlon final is scheduled for Thursday and the women’s for Aug. 20.

The DiLorenzo family also owns a separate company, Farmingdale-based Swimwear Anywhere Inc. That business, established in 1995, manufactures swimwear under its own Beach House, Coco Reef and Roxanne labels, as well as licensed brands including Michael Kors, DKNY, Tommy Hilfiger and Kate Spade New York.

TYR and Swimwear Anywhere share a 65,000-square-foot facility in Farmingdale, Matt DiLorenzo said.