Front, sleeves and back in Airflow TX Warm, which offers greater warmth, excellent moisture management and exceptional comfort against the skin on the coldest days. Side panels and underside of sleeves in lightweight and breathable Airflow fabric. Silicone band at bottom of garment. Small back pocket for bars or gels. Front YKK® #3 coil zipper. Flat-lock stitching to prevent seams from rubbing against skin on armholes and shoulders.