Extremely light & breathable. Wear these when all you care about is getting faster. Ultra-lightweight, breathable but still extremely durable fabric. Internal mesh liner helps moisture escape & adds breathability. Anti-odor technology prevents the growth of odor causing microbes. Covered elastic waistband with internal drawcord. Mesh hand pockets & internal waist key pocket. Reflective logo for greater visibility on low-light runs. Inseam: 7". Body: 2.2 oz. Polyester. Liner: 2.5 oz. Polyester. Imported.