Cool vest with instant cooling, featuring 5 cooling/heating functions. - Model: PRO model - Cooling function: Maximum cooling temperature -28℃ - Heating function: Maximum heating temperature 39℃ - Cooling mode: Instant cooling - Size: FREE SIZE - Features: Advanced cooling/heating function in 5 locations Thank you for viewing. This product was purchased in May 2025 and only tried on once. I will also include two "PROCORE (R) ARKS AIR BLOW Piste" 3L size jackets, also purchased from Workman. (These were also only tried on and washed once.) I changed workplaces shortly after purchasing this, so I haven't had a chance to use it. I hope someone who needs it will be able to use it.