Features: • Dual-layer ColdGear fabric with an ultra-warm, brushed interior and a smooth, fast-drying exterior. • Expandable center-front waistband pocket is water-resistant and keeps your phone secure, with no bouncing. • 4-way stretch construction moves better in every direction. • Material wicks sweat and dries really fast. • Anti-odor technology prevents the growth of odor-causing microbes. • Reflective details for low-light runs.