Goretex Sierra Membrane The Gore-tex Sierra membrane provides total protection from water, matched with extreme breathability for comfort in all weather conditions. Providing maximum protection from rain, wind and snow your feet remain warm and dry. The micro-climate created within the shoe allows you to face the harshest conditions when riding. Double shield construction Northwave construct these shoes using double shield construction whereby they overlap two different uppers, anatomically integrated with each other and designed to work together. This ensures absolute protection against water and cold. The outer layer blocks the weather, whilst the inner works to create a micro-climate for your foot. All the benefits of a shoe cover, without the weaknesses of a shoe cover. Speedlight 3D Sole Performance and lightness. The nylon chassis is filled with fiberglass and co-injected to the outer polished TPU shell. The rubber studs provide excellent grip even on the most slippery surfaces. S.L.W.2 micormetric closure This new system is now lighter smaller and more accurate than previous versions with a dual action release. The closure of the shoe can be easily adjusted while pedaling thanks to the step by step' button, pressing it releases pressure a small step at a time. The release side button also makes it easy to fully open the shoe through lifting of the button. Power strap closure The power strap protects the speed lace internal lacing system and acts as a cover to help with easy cleaning of the shoe