Mens Hard Yakka 2 Tone Hi-Vis Jacket. Yellow & Navy - Sizes S - 4XL. This high vis, heavy duty work jacket is built tradie tough and with excellent functionality that does not sacrifice comfort. The tough pre-shrunk cotton outer can handle a beating while the brushed cotton lining is soft and smooth to wear. Back vents allow movement when required and Velcro® closures on the cuffs ensure sleeves are kept secure and out of the way when you're working.