Our Squall 3-in-1 offers trusted year-round weather protection you will appreciate. Wear the waterproof nylon shell to handle rainy days in milder weather. The removable high pile fleece jacket stands alone, offering warmth without weight. When the temperature drops, just put the two together, zip up, and you re ready for Mother Nature s windiest, worst. There are one, two, three reasons to choose this Squall jacket..