質しつのいい

expression, noun-modifying (irregular)

good-quality; high-quality

Prenominal phrase meaning 'of good quality'; used before nouns to describe something as being of superior quality.

• この店みせは質しつのいい商しょう品ひんを扱あつかっている。

  This store carries good-quality products.

• 質しつのいい睡すい眠みんをとることが大たい切せつだ。

  It's important to get high-quality sleep.