Oros Powered by Solarcore Hip Padded Skinny Leggings Size Small Black Size Small No Flaws Oros leggings are made with Solarcore insulation, which is a flexible, ultra thin material that can warm more effectively than down or synthetic jackets. Some Oros leggings are designed for high-output activities, while others are better suited for layering under a shell pant for cold weather protection. #Activewear #Athleisure #Winter