cooling vest
A vest with built-in cooling features, often used in hot weather or work environments. Wasei-eigo from English 'cool vest'.
wasei-eigo (Japanese-coined English), from cool vest
At the construction site in summer, workers wear cooling vests.
I bought a cooling vest as a measure against heatstroke.
Wasei-eigo from English 'cool vest'. The term is not used in English with this exact meaning.