Step into the Future with Silop's High-Tech Jackets air gel down jacketCold resistant Black Technology: Aerogel Assault Jacket, Defending Against 40C Cold. Is there a lightweight yet exceptionally warm winter jacket available? Certainly! Inspired by NASA spacesuits, Silop has been developing aerogel, a highly insulating and lightweight material, since 2019. After three years of rigorous testing, Silop finally launched its product in the fall of 2023. Introducing Silop Jacket, a thin and warm jacket. size medium