This is an unused Sadako cool neck cooler, size S. Although it is unused, please refrain from purchasing if you are overly concerned about minor details. ※【Final Price Reduction!!!】First come, first served!!! This size S neck cooler can be cooled in the refrigerator and used, cooling below 28°C. - Product Name: Hie Ring (Cooling Ring) - Size: S - Main Materials: Outer shell...TPU. Cooling material...PCM - Operating Temperature: Cools below 28°C - Features: Can be cooled in the refrigerator - Design: Illustrated design (Sadako)