Northwave Celsius Artic 2, Gore-Tex, SPD Mountain Bike Boot The Northwave Celsius Arctic 2 GTX winter boot is constructed to withstand the most extreme weather conditions winter has to offer. Warm & waterproof & made with the Gore-Tex® membrane that guarantees total protection against water, wind & snow, while still delivering extremely good breathability. Jaws Carbon Reinforced Sole Made with thermoplastic material enriched with carbon powder & a natural rubber tread for a great lightness & maximum grip even on the most challenging descents. Speed Lace 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.