High insulation. High breathability. Both are critical for comfort in the coldest winter conditions, because they preserve warmth and eliminate the risk of internal moisture turning into a clammy chill turning into frigid, stinging, ride-ending discomfort. The Ultraz P1 achieves both, with triple-layer insulation in key areas that breathes well. The yarns are also infused with merino wool, which has natural odor-resistance and – in the event precipitation or road spray gets past your winter booties – stays warm, even when wet. The cuff height, up to 18cm (7in), reduces the risk of gaps between layers.