This 3-in-1 parka gives you complete flexibility in adapting to any weather conditions you encounter. The main shell is waterproof. The inner liner is insulated with Premium Down. You can wear either one on its own, or put them together for maximum warmth and protection.NOTE - Temperature ratings are based on a controlled laboratory test, using low and moderate activity levels. 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 or L/12.