Purchased this summer and used only once. It worked perfectly, but I'm selling it because I don't anticipate using it in the future. (Washed) 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 Advanced Devices for Instant Body Cooling/Heating 【Cool in Summer】 ・Amazing speed cooling ・Up to -28°C (surface temperature approx. -3°C) (※Temperature difference from the device surface temperature when the ambient temperature is approx. 25°C, according to the manufacturer) 【Warm in Winter】 ・Amazing speed heating ・Up to +39°C (surface temperature approx. 49°C) (※When the ambient temperature is approx. 10°C, and wearing outerwear) 【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)!】