Price reduced! A free-size cool vest with 5-point cooling and heating functions, offering instant cooling to -28°C and instant heating to 39°C. - Model Name: WindCore PRO model 2025 model number wz-5 - Cooling Function: Instant cooling to -28°C - Heating Function: Instant heating to 39°C - Size: Free size - Heating Speed: Fastest 1 second - Battery: Usable time: 20 hours - Switch Control: HEATER MODE / ICE MODE - Design: 5-point cooling and heating function Includes instruction manual and warranty. Thank you for viewing. I only tried it on once. (Purchased in July) It took some time to set up the 5 points, so I will send it already set up, allowing for immediate use! (Battery remaining 98%) I will pack it with bubble wrap for shipping. *Please understand that this item has been stored at home before purchasing. *Please refrain from purchasing if you are sensitive to used items, as I have only tried it on once.