To mark International Women’s Day, March 8, Röhnisch launched the Infinite Flex sports collection for “changing female bodies.” The changes in question occur from hour to hour. According to the Swedish brand, up to 90 percent of women of child-bearing age undergo physical or mental changes during their monthly hormonal cycle, and it has therefore designed the collections’ items to adjust accordingly. The sports bra, for instance, has adjustable straps over the shoulders and under the bust, while the tights can be adjusted above the hip. The items are made of a recycled stretch material and come in two colors. The ad campaign will feature the artist Molly Hammar, the “fitness feminist” Sara Dahlström and the public relations professional Louise Sondlo.