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Rush Polar Gtx Is The Product Of The Rush Family Designed Specifically For The Winter Period, Ideal For Excursions On The Snow And Snowshoeing In Low Temperature. Thanks To The Combination Of Gore-Tex® Duratherm And Primaloft® Gold Insulation Eco, Which Provide Maximum Protection Against The Cold, This Three-Hook Boot Can Also Be Used For Arctic Excursions. Laboratory Tested, It Guarantees Protection Down To Extreme Temperatures Of -20°C/-4°F.