Thank you for viewing. Please check my profile before purchasing. ◾︎Size Body size: 13cm x 8cm x 0.5cm This is "Hiyasma," a special cold pack that absorbs the heat from your smartphone and can be reused at room temperature without needing to be recharged or cooled in a refrigerator. 【Reusable at Room Temperature】 It requires no power and can be used anywhere, without the need to cool it in a refrigerator. It's a special cold pack that can be reused simply by leaving it at room temperature when it has completely melted and become transparent. ※Please refrain from purchasing if you are sensitive to used items. ※We do not accept partial refunds or price negotiations for minor damages. Please understand that these are used items before purchasing.