News Kourtney Kardashian Wore a Cropped Sweater with the Track Pants You've Been Coveting By Olivia Bahou Olivia Bahou Facebook Olivia Solomon is a New York-based writer and editor who covers all things fashion, lifestyle, celebrity, and pop culture. She was previously the Assistant Digital Editor for InStyle, and her work has appeared in many national publications. InStyle's editorial guidelines Updated on December 21, 2017 @ 10:30AM Pin Share Tweet Email On the same day that Khloé Kardashian (finally!) confirmed her pregnancy with the first picture of her bare baby bump, her older sister Kourtney Kardashian was making headlines for a different reason. The 38-year-old stepped out in Los Angeles on Wednesday afternoon in a winter-ready ensemble that (in my opinion) is almost equally as groundbreaking as her sister's snap. The mom of three was spotted out with her son Mason while wearing the cutest pair of Sandro black straight-leg track pants with white and red stripes down the side (shop similar here). While athleisure-inspired pants are all the rage this season, Kardashian managed to do the impossible and make the look totally business-appropriate with some key pieces. See all her best street style looks in our gallery. Clint Brewer / Splash News The reality star stepped out in L.A. wearing a pair of black track pants with red and white stripes down the leg. She paired the look with a cropped turtleneck sweater and black pointed-toe boots. Clint Brewer / Splash News The reality star paired the trousers with a cropped beige turtleneck sweater (shop similar here) and pointed-toe black leather booties. Oversize sunglasses and a sleek blowout completed her put-together look. While we're busy taking style notes, Kourtney is celebrating her little sister's first pregnancy. We couldn't be happier for the sartorially savvy fam.