These terms refer to masks designed for outdoor sports, crafted from ice silk fabric (a lightweight, breathable material known for its cool-to-touch feel), with dimensions approximately 14.2" in length and 8.7" in width. The ice silk material offers moisture-wicking properties, helping to keep the face dry by absorbing sweat, while its thin, airy texture enhances breathability—critical for high-energy activities like running, cycling, hiking, or jogging.