This is a large-sized neck cooler that cools with water, lowering the perceived temperature by -8°C. Although it is new and unused, please understand that it has been stored at home. - Brand: R-BOOM - Size: L - Product Name: Neck Cooler - Cooling Effect: Perceived temperature -8°C Thank you for viewing. It will be shipped in an OPP bag via Nekopos. Thank you.