Each of our coats features a “comfort zone" heat indicator. Kanuk coats range from zones K1 to K4. K1 coats will protect you at temperatures ranging from 0°C to -10°C. K2 coats will protect you at temperatures ranging from -15 °C to -20 °C. K3 coats will protect you at temperatures ranging from -20 °C to -25 °C. K4 coats will protect you at temperatures ranging from -25 °C to -30 °C. Therefore, it is important to be well informed about the comfort zone before making a purchase. These comfort zones are presented for your information. The ability to withstand the cold depends on various external factors (e.g., humidity, wind) and internal factors (e.g., fatigue, physical fitness) that vary from person to person. The comfort zone can vary by 5°C in either direction.