Sisters Kendall and Kylie Jenner enjoyed a fun-filled day in the snowy Aspen mountains on New Year's Eve.The Hulu stars, 27 and 25 respectively, bundled up to brace the cold as they went snowboarding with friend Justin Bieber.Joining in for the activity was the makeup mogul's adorable four-year-old daughter Stormi Webster. Winter fun: Sisters Kendall and Kylie Jenner enjoyed a fun-filled day in the snowy Aspen mountains on New Year's Eve, while Kylie was also joined by her daughter Stormi WebsterKendall was nearly unrecognizable as she slipped into a black North Face overalls snowsuit to keep warm.She layered it over a two white shirts, one of which was short-sleeved and had a red graphic print. She also wore a black scarf and made sure to cover her money-making model visage to protect from frostbite.Kendall, the founder of 818 Tequila, added a black hard helmut and supersized black ski goggles, making her face virtually invisible. Cool mom: Kylie opted for an all black ensemble as she treated her little one to the wonder of wintery scene Group activity: The Hulu stars, 27 and 25 respectively, bundled up to brace the cold as they went skiing with friend Justin Bieber Covered! Kendall was nearly unrecognizable as she slipped into a black North Face overalls snowsuit to keep warmJenner made sure to also keep her hands covered as she wore thick black gloves, which matched her snow boots.She glided gracefully down the powdery slopes, adding a red coat as she swished through the snow.The longtime television personalities were with a large group of friends throughout the day.Justin was easily noticeable as he sported a bright blue snowsuit with a mixed white and black pattern. Crew: The longtime television personalities