... smoothly,saving outside and inside space,airtightness,sound&heat insulationg,waterproof,easy to use & install ... white color, sliding smoothly, antiweatherability, heat-insulation, sound-proof,air permeability performance,Good watertightness performance,heat rsistant property. ... styleProduct FeatureEnergy saving and Ecofriendly; Sound and Heat insulation; Good air and Water proof; Anti-aging and Easy ...