The Alpinestars Motorbike Base Layer Cooling Vest is packed with features... Specifications include: Three-layer textile construction with moisture-wicking fleece lining Anatomical fit with stretch inserts on side torso Strategically positioned ventilation for airflow and breathability Innovative core cooling system evenly releases moisture during rides Lightweight chassis with refillable water chamber for repeat use Vest features anti-bacterial properties Incorporated stretch inserts for closer fit Zip closure system