Our Track Jacket features a relaxed silhouette paired with lightweight nylon fabric that blocks wind on breezy days. While it's less technical than a dedicated running shell, it can certainly hold its own for easy days and features a vented back for air flow. We'd wear it going to the gym, during cooldowns, or casually with a pair of wool pleated trousers; its simplicity lends itself well to plenty of use cases. Buy once, wear often.