Christian Louboutin made one key change to the iconic red soles from his namesake brand for Taylor Swift.Louboutin told InStyle he used rubber soles instead of leather for Swift's Eras Tour shoes.The shoe designer previously said he had crafted 250 pairs of shoes for the singer to wear on her tour.Taylor Swift's Eras Tour shoes were made for walking, running, and jumping regardless of the weather. After all, the show must go on.In an interview with InStyle published on Wednesday, shoe designer Christian Louboutin said that he made one key change to his iconic red soles when creating footwear for the singer on her tour."Weather is unpredictable," Louboutin told InStyle. "However, each pair is crafted with a signature red rubber sole, which makes it easy to dance."The shoe brand's iconic red soles are usually made from leather and painted with a special red lacquer, per Louboutin's website.The designer added that he typically uses rubber soles when designing shoes for musicians on their tours, as this ensures that the shoes can withstand performances night after night.The designs of Swift's Eras Tour shoes were inspired by the singer's past looks, and were the result of a collaborative effort between Swift, her stylist Joseph Cassell, and himself, Louboutin said."Each pair is made to fully allow for quick changes through the entirety of the show. As they are dancing for over three hours, comfort is also extremely important. So we incorporated sturdy block heels and also flats," Louboutin said.In November last year, one lucky Swiftie managed to snag an exclusive Eras Tour souvenir a bejeweled heel from one of the singer's Louboutin boots that had broken off while she was performing.In May, Louboutin told Vogue that he had designed 250 pairs of shoes for the superstar, including 60 new pairs for the European leg of her Eras Tour alone.Luxury cobblers previously told Business Insider that the "Cruel Summer" singer may have sparked an interest in Louboutins among Gen Z after donning the red soles on her tour."She's a big influencer in the brand and product," Pasquale Fabrizio, designer and owner of Pasquale Shoe Repair in Los Angeles, said. "Just endorsing it and wearing it allows the younger generation of girls to go after that look. She exemplifies fashion."Fabrizio added that he's seen more and more people come into his shop over the past few years to have their Louboutin shoes repaired.For reference, the brand's iconic stiletto pumps cost upward of $795, while boots cost upward of $1,195, per the brand's website.A representative for Swift did not immediately respond to a request for comment sent by Business Insider outside regular hours.