The purchase was in May 2025. The warranty card does not have a date on it. I wore it a few times, but it doesn't quite fit my small, feminine frame, so I'm selling it. Sustainable Comfortable Work! All-season climate control clothing Instant cooling/heating of the body with 5 advanced devices: Peltier vest Passed verification tests based on the body mechanism unique to the Comfortable Work Laboratory, with advanced cooling/heating effects ●Product Features● Japan Meteorological Association Promotion Heatstroke Zero Project Official Item Cool in the summer ・Amazing speed cooling ・Up to about -28°C <Surface temperature about -3°C> (※When the ambient temperature is about 25°C, the temperature difference from the device surface temperature (according to the manufacturer)) Warm in the winter ・Amazing speed heating ・Up to about +39°C <Surface temperature about 49°C> (※When the ambient temperature is about 10°C, when wearing a jacket outside the vest) The most in Workman history! 5 Peltier devices ・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 ・Turning the dial on the right chest allows you to 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 ・Cooling mode can be switched between 4 types, and heating mode can be switched between 2 types, supporting fine temperature adjustments Fits sizes S~5L (chest 80~124cm)! ・Free size design that fits various body types ・Made of stretchy fabric for easy movement ・Prevents slippage and enhances fit to the body by adjusting the front and side belts ・If the front belt is too tight, you can remove the lower belt and wear it Material Main body: 90% polyester, 10% polyurethane Mesh part: 100% polyester