• durable connection of inner sock lining with foamy polyurethane material• limited impact of both high and low temperatures ensure excellent thermic insulation of feetapproved by testing. The model has CI sign.• all-years-round usage• lighter than rubber or PVC boots• easy adjusting to the foot and calf thanks toprofiled and flexible upper part• resistant to mechanical damages• anti-slip SRC outsole• meets the requirements of ISO 20347:2012