Last year's workmen's "wearable frozen clothes" evolved to accommodate extreme heat of 45 degrees Celsius; companies started buying in bulk as a "new common sense for heatstroke prevention" | Life | Toyo Keizai Online
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This year too, Workman's ``wearable frozen clothes'' ``Wind Core Ice x Heater Peltier Vest'' has evolved. How far have improvements in cooling performance, comfort, etc.