Colours may vary.Workfit offers comfort and support for all work shoes, boots and narrower fitting rubber work boots. Formthotics Workfit offer support that you can rely on in tough working conditions, when you are on your feet all day. The top beige comfort layer provides cushioning and the black base provides support, placing your foot in a natural position so that your feet are less fatigued. Workfit is designed to fit into all work shoes, boots and narrower fitting rubber work boots. Sizing Chart (According To Shoe Size)