The S11 generation of the GT Shell Jacket is water-repellent, windproof, and breathable – the three touchstones of adaptability that define a versatile cycling shell for all seasons. In summer, it occupies a jersey pocket for days when storm clouds threaten or long, chilling descents loom. In the shoulder seasons, it layers over midweight Spring Fall jerseys, adding weather protection to thermoregulation. In winter, it creates a final bulwark over a winter jacket, shielding against extreme, wet conditions. While keeping precipitation and road spray out, the jacket also expels internal moisture, preventing a stifling, humid microclimate in summer and damp, clammy chill in spring, fall, and winter. The extended collar and hem protect your neck and repel road spray, and ultra-elastic cuff inserts create a seal around the wrists or gloves.