I am selling this item because I purchased it this summer and only used it once, so I have no further use for it. I will prioritize those who are willing to purchase it as is, with no returns and no price negotiations. 2025 Model - Peltier Vest with 5 Evolved Devices for Instant Body Cooling/Heating 【Cool as Ice in Summer】 ・Amazing speed cooling ・Up to -28°C (approx. -3°C surface temperature) (※When the ambient temperature is approx. 25°C, the temperature difference from the device surface temperature (according to the manufacturer)) 【Warm and Cozy in Winter】 ・Amazing speed heating ・Up to +39°C (approx. 49°C surface temperature) (※When the ambient temperature is approx. 10°C, when wearing an outer garment over the vest) 【Workman's Most Ever! 5 Peltiers】 ・Equipped with a total of 5 Peltier devices: 1 on the back, 2 on the lower back, and 2 on the front ・Experience coolness/warmth over a wider area! 【New Function! Dial Moving Adjuster】 ・By turning the dial on the right chest, you can adjust the position of the two Peltier devices on the lower back up and down ・You can change the cooling position, so you can feel the cooling/heating more continuously! 【Adjustable to Your Preferred Temperature】 ・You can switch between 4 cooling modes and 2 heating modes, allowing for fine temperature adjustments 【Fits body types from S to 5L size (chest 80-124cm)!】