The hybrid shell of this 3-in-1 has water-repellent nylon at the shoulders, hood, lower body, and sleeves, and a wool-blend at the center of the body. The nylon liner jacket has Premium Down insulation for superior warmth. The shell and liner can be worn alone or together, depending on weather conditions. 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.