Celebrity Kendall Jenner Kendall Jenner Redefined Athleisure in Split-Hem Leggings and a Cropped Cardigan Effortlessly chic. By Tessa Petak Tessa Petak Instagram Tessa Petak is a Brooklyn-based writer who helps to cultivate InStyle's illustrious news coverage across a wide range of topics including celebrity, fashion, and entertainment. She also produces and composes celebrity profiles and features for the site and InStyle's digital issues. InStyle's editorial guidelines Updated on January 18, 2023 @ 01:27PM Pin Share Tweet Email We're halfway through January, and it appears Kendall Jenner is still sticking with her New Years' resolutions with another pilates class alongside her BFF and model peer Hailey Bieber. To be fair, though, the two have been hitting up the studio long before 2023 and their frequent workouts are always guaranteed to come with the chicest of gym outfits. On Tuesday, Jenner was spotted leaving the pilates studio in trendy black split-hem flared leggings from Alo, which she paired with a white sports bra and a black cropped cardigan (only buttoned once). She accessorized with a New York Yankees baseball cap, light blue and gray Nike sneakers, a large black gym bag, and coordinating sunglasses. Kendall's dark hair was worn down beneath her hat, and she carried a leather bomber jacket on her forearm. Getty Images Bieber's athleisure look, for her part, included a beige trucker jacket, which she wore with coordinating hot pants and a white T-shirt. Kendall Jenner Went Braless Underneath an Ultra-Sheer LBD The pals truly never miss when it comes to their post-pilates 'fits from twinning in bra-and-leggings sets to '80s-inspired windbreakers. However, over the weekend, they traded in their sweats for formal-wear. The two attended Lori Harvey's 26th birthday bash in matching LBDs. Jenner's was a sheer, one-shoulder dress with a red leaf choker, while Bieber's mini included a midsection ruffle and lace cutouts. Kendall and Hailey are now practically attached at the hip, but Jenner once revealed that it was her sister Kylie Jenner who actually introduced the two friends. “[Hailey] was actually best friends with Kylie, and I was good friends with her cousin Ireland [Alec Baldwin‘s daughter],” Jenner previously told Elle. "Hailey lived in New York, and whenever we were there, we would hang out with her."