Northwave Fahrenheit Artic 2, Gore-Tex, SPD Road Bike Boot All Northwave’s winter cycling shoes are designed & made to offer maximum protection against the weather, without comprising breathability or efficiency of movement, & the Fahrenheit Arctic GTX is no different using Gore-Tex technology & Northwave's excellent innovation to provide a finest top quality winter boot for extreme winter weather conditions. Gore-Tex® membrane– Northwave is the first brand to have exclusively launched Gore-Tex® cycling shoes.– The Gore-Tex® membrane guarantees total protection against water, wind & snow, while still delivering extreme breathability.– Sweat is released as water vapor thereby creating an ideal microclimate inside the shoes so your feet are always warm & dry.NRG Carbon Reinforced sole NRG Air Carbon Reinforced provides increased stiffness thanks to the new blend of nylon reinforced with fiberglass & enriched with carbon. As with the whole road soles collection, it features the Air Flow ventilation system. Vents favour an optimal air flow in & out.S.L closing system The Speed Lace closing system allows a perfect sealing of the foot, while providing excellent speed & functionality: lock & release in a few gestures. Be visable, be safe range The “ Be visible, Be safe” range is designed to ensure maximum visibility & safety for cyclists even in the trickiest conditions. Particularly in winter when days are shorter & you’re riding in fog & rain, it’s vital for cyclists to have technical features they can count on to increase visibility: that’s why our bright fluorescent colors, strategically positioned reflective details & inserts, & the special Hi Viz LED device are the best solutions available.