noun
permanent press
Refers to a fabric finish that resists wrinkles and retains creases after washing, or to garments treated with this finish.
このシャツはパーマネントプレス加工がされているので、アイロンがけがほとんど不要です。
This shirt has a permanent press finish, so it hardly needs ironing.
Variant with interpunct; less common in running text.
Borrowed from English 'permanent press'.