Little extra warmth during fresh mornings and mild evenings or throw it on for a cosy cool down after a long training run the front half zip offers easy access and ventilation and the zipper cover prevents rubbing and irritation on your neck and chin running in this jersey is a breeze its made from lightweight fabric so youll have nothing weighing you down the fabric is also enriched with asics motiondry technology so the jersey works to wick sweat away from your skin keeping you cool a