WindCore PRO model free-size cool vest with both cooling and heating functions. - Model: WindCore PRO model - Functions: Cooling and heating - Peltier elements in three locations: between the shoulder blades and on both sides of the body - Temperature range: Cooling capacity -23°C (when ambient temperature is 25°C) / Heating capacity +39°C (when ambient temperature is 10°C) - Speed: Temperature change in 1 second - Size: Free size, adjustable with belts - Cooling and heating can be switched with a button - Equipped with strength adjustment and a fluctuation function that repeats ON/OFF at regular intervals - Comes with a battery - One of the rings that secures the Peltier element on the side of the abdomen is missing, so it is secured with a cable tie.