Keep your kids warm with our top-of-the-line thermal wear, featuring the latest technology in base layer spinning. The Zeo-Line utilises high-quality micro-fibres, creating coiled or "crimped" threads for superior heat retention. Compared to traditional fibres, these microfibres offer a larger surface area and smaller air pockets, enhancing insulation. The three-layer knit structure maintains an air-layer between dual fabrics, ensuring consistent warmth by pulling moisture away from the skin. Perfect for those with wool sensitivities or engaging in physically demanding activities, this synthetic fabric provides optimal comfort, with the additional feature of flat-lock seams for extra comfort and easy layering.