noun
must-have; essential item
Wasei-eigo from English 'must item'; used in fashion, lifestyle, and consumer contexts to describe something indispensable or highly recommended.
wasei-eigo (Japanese-coined English), from must item
今年の夏のマストアイテムは、このサンダルだ。
This summer's must-have item is these sandals.
旅行のマストアイテムをリストアップした。
I listed the essential items for the trip.