This is a neck cooler to cool your neck. Made of PCM material, it freezes in the freezer (freezes naturally below 28°C) and can be used repeatedly. It is condensation-resistant and comfortable to use. [Color] Blue [Material] PCM [Diameter] Outer 14.5cm x 13cm, Inner 10cm x 8cm Used a few times, but there are no noticeable scratches or stains. I am also listing this item elsewhere, so I will check for stock availability and any scratches or stains due to aging. Please comment before pressing the purchase button. Thank you.