To pedal during winter and face the most extreme conditions on your bike with confidence, the Estremo are made for you. Designed by the brand Castelli, these cycling overshoes are simply the warmest and most protective of the brand. The Gore-Tex® technology combined with Polartec® lining ensures you never lack warmth and keep your feet warm. Finally, the YKK® zipper allows for an optimal fit of the Estremo and protects you from the rain.