Alpen released a neck cooler “Tigola Ring Cool 28℃ 4h” from the Tigola brand, available in three sizes, all priced at 1999 yen.
Designed to last for 4 hours at 34°C. Made of PCM material that freezes naturally at temperatures below 28°C. Freezes in cold water in about 60 minutes and in the freezer in about 30 minutes. The diameter is approximately 3.3 cm in order to provide a wider contact surface.
Sizes are S/M/L. The S size has an inner diameter of approximately 9 cm, the M size has an inner diameter of approximately 10 cm, and the L size has an inner diameter of approximately 11 cm.
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