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 nitrogen 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. SUPERDRI lining - is hard wearing, wicks moister away from the wearers foot to prevent a sweaty and uncomfortable feel. It is fungus and rot proof so will not smell like cotton-lined boots. TRAIL-GRIP outsole - superior grip on a variety of surfaces, the tread is designed to work with the action of the foot.COMFORT RATING - -20‚ºc to 20‚ºc.