Northwave Celsius 2, Gore-Tex, SPD Mountain Bike Boot The Northwave Celsius 2 GTX winter boots are designed & made to offer maximum protection against the weather, without comprising breathability or efficiency of movement. The new raised neoprene design fits snugly around the ankle to minimise any water seeping in. Waterprof & breathable Gore-Tex membrane that guarantees total protection against water, wind & snow, while still delivering extreme 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.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. Further details -Sole: Jaws carbon reinforced Upper: Thermowelded without stitching construction, Gore-Tex® Pique membrane Closing system: S.L. System + Power Strap Heel: Integrated heel system Footbed: Special G.T.X. Temperature: -10°/+15° CWeight: 491 gr