TIDELINE 4.0™ is insulated and waterproof, with excellent grip, made for all day comfort. The Calve height boot is perfect for those who do not enjoy wearing a full length wellington but do not want to compromise on the quality. 4MM INSU-FOAM ULTRA™ – gives all round foot comfort and insulation. 5mm POLYOU™ footbed – provides a soft cushioning for an athletic shoe feel. A million microscopic bubbles that insulate the wearer from cold surfaces. UNDERFOOT CHASSIS™ – give a sure footed platform. SUPERLITE® technology – makes this boot 30% lighter than conventional rubber boots, buoyant and extremely comfortable thanks to its’ moulded shape.