Our ultralight CirrusLite Down Jacket is a consummate traveler, whether your destination is cross town or far off the beaten path. The wind-resistant recycled nylon shell is insulated with premium down and treated with a durable, water-repellent finish that causes moisture to bead and roll off rather than soaking into the fabric.NOTE - Temperature ratings are based on a controlled laboratory test by an independent university lab. Also consider - your sensitivity to cold and wind-chill; time of exposure; activity level; and use of layering.Models shown are 5'9 to 5'11 tall, wearing size S/4, L/12, or XXL/18.