Navy is the colour that does the most work in a track jacket and most men already know this without ever having articulated it. It sits with grey, with white, with olive, with virtually everything already in the wardrobe. The question is never whether to own one. It is whether the one you own is actually good. Too many track jackets get the silhouette wrong, cutting either too boxy to wear over anything or too slim to move in comfortably. The hardware matters more than people give it credit for. A cheap zip pull on an otherwise decent jacket is the kind of detail that quietly undermines the whole thing. We have been looking specifically at options that sit well over a t shirt, layer under a heavier coat without bunching, and hold their colour after washing. Some are closer to sportswear. Some lean more casual than athletic. All of them are worth the rotation space.