This blue cooling pad with instant cooling function is perfect for preventing heatstroke. It can maintain its cooling effect in environments below 28°C. You can also put it in the refrigerator or freezer, or use ice water or cold water for rapid cooling. Cooling Time Guide: Cooling time in freezer/refrigerator → Approximately 20 minutes Cooling time using ice water or cold water → Approximately 30 minutes Cooling Effect Duration: The duration of the cooling effect may vary depending on body temperature and the environment. When cooling this product with cold water, sufficient cooling effect may not be obtained with lukewarm water. Please use cold water below 28°C. - Brand: GENKI - Type: Cooling Pad - Color: Black Size: Approximately 22.5 x 28.5 cm (size excluding elastic straps) - Features: Instant cooling, heatstroke prevention Reusable - Usage scenarios: Usable in various situations - Target: For babies, children, etc. - Size: Can be fixed in 4 places Thank you for viewing.