The Rossignol Pure Pro Heat is a great intermediate boot for someone looking to keep the comfort up all ski season! The Ultra warm Therm-Ic liner ups the stoke even more by having a built in heater (charger included) to make sure you stay warm all day long, no matter how cold the temps drop. The 100 flex index rating is great for someone looking for a supportive and progressive boot for your next ski day. *Note- the heating element in this boot has not been tested, but includes a charger*