Weight: 145gHighly breathable and ultra-lightweight materials.4-way stretch woven fabric for extra comfort.Integrated (zip-free) back pocket and key loop.Antimicrobial inner brief treatment keeps you fresh.Reflective logo for safe visibility at night.Perforated mesh back allows for extra airflow.Adjustable waistband: improve your comfort in an instant.Light rain-repellent technologyMade for running, training, workouts, and more.