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 quilted liner jacket stands alone as a warm, lightweight jacket. 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..