Louisiana Sen. Bill Cassidy knows how you can support his constituents.

For the tenth yr, the politician and physician — together with 12 other members of the Congress and greater than 130 staffers — donned their seersucker jackets and pants in Washington, D.C., to rejoice National Seersucker Day.

Joseph Haspel Sr., of Recent Orleans, is credited with creating the primary seersucker suit for the U.S. market in 1909. His great-granddaughter, Laurie Haspel Aronson, runs the Haspel company today.

“Today, we rejoice National Seersucker Day. Seersucker is a Recent Orleans invention and trendy warm weather staple,” Cassidy said. “It’s an honor to have carried on this tradition for the past 10 years alongside my colleague Sen. Dianne Feinstein. I sit up for many more.”

Former U.S. Sen. Trent Lott brought Seersucker Thursday to Congress in 1996, however it eventually fizzled out. Cassidy revived it in 2014 when he was within the House of Representatives after which brought it to the Senate when he assumed that role in 2015.

On Wednesday, Cassidy and Feinstein passed a resolution within the Senate to determine Thursday, June 8, as National Seersucker Day.

In a video posted to Twitter on Thursday, Cassidy donned a seersucker jacket and invited people to go to his office in Washington to see the seersucker wallpaper he uses. “National Seersucker Day,” he said within the video, “a day by which we bring a little bit little bit of the culture of Louisiana to Washington, D.C. I hope you enjoy seersucker on a warm Louisiana day, which makes it feel prefer it is a cool Louisiana day.”