The Celsius Arctic R GTX is the winter boot of choice with all the features you need to stay comfortable while exchanging calories for power out on the road. The NRG Air Carbon Reinforced sole has a rigidity index of 8.0 combined with an overlap construction upper helping to transfer power by reducing the dispersion of energy. The SLW2 dial closure system evenly binds the foot without any pressure points and features step-by-step release, which allows for adjustment of the shoe by the millimetre in a quick and intuitive way. Made with a waterproof and windproof Gore-Tex membrane guaranteed to keep you protected from the elements. Northwave has a working partnership with Gore fabrics which goes back 15 years. The consolidated experience of the Gore-Tex technicians and Northwave Lab designers are reflected in the products they create together, with a creative synergy that capitalises on constant technological advancement. The Easyfit Climaflex collar combines the flexibile protection of the Gore-Tex Rattler membrane with the thermal insulation of Neoprene. Key Features NRG Air carbon reinforced sole (8 stiffness index) Reinforced toe area with anti-abrasion technology. SLW2 closure system. Easyfit Climaflex collar with Gore-Tex Rattler® membrane. Arctic 4layer insole. 360 ° visibility.