On Weather-Shirt Women's Running Apparel Fossil/Rock : The On Clima-Shirt for women is the perfect layering piece for running in chilly weather or for wearing casually during your errands. This super soft top features excellent breathability from micro-ventilation-patterning, keeping moisture under control during activity. Laser-cut ventilation at the back provides further airflow and the adjustable V-neck design allow you to personalize this top according to the climate. Reflective On logo featured at left side hem. Flexible Polyester/Elastane and 4-way-stretch Nylon/Elastane protective fabric with laser-cut ventilation at the back. Features anti-bacterial treatment to maintain freshness. Special Sizing Note: The manufacturer indicates apparel fit as being one size down from size featured on label. Due to this note, we suggest sizing up from your normal size.