Color: Black Material: Polyester Size: EL (Chest 104-122 cm) Retail Price: ¥19,800 A cooling wear designed to prevent heatstroke, without using batteries or ice. This environmentally friendly product utilizes evaporative cooling. It provides a cooling effect of approximately 3°C even with room temperature water. Furthermore, using cold water will provide a more comfortable cooling sensation. The water poured into the Aqua Water Vest continues to evaporate from the outer material, cooling the contact cooling sensation of the inner material. The evaporative cooling continues for as long as the water is retained, providing an effect that lasts for over 24 hours. When used in hot conditions, replacing the water three times a day (morning, noon, and evening) with cold water will maintain the cooling effect for an extended period.