I purchased two of these in different colors, but I didn't use one, so I'm selling it. It was new and unopened, but the bag opened during storage, so although it's a new, unused item, it has been opened. Please refrain from purchasing if you are concerned about home storage. Immediate purchase is OK. Since the original bag is open, I will take it out of the bag, take measures to prevent water damage, and wrap it in cushioning material for safety before shipping via Yu-Packet Post. Cover size: (approx.) 24 x 20 cm Material: Cover body: Polyester Coolant: Water, glycerin, Absorbent polymer, bactericide Coolant outer bag: Vinyl chloride resin Thank you for viewing.