Good Quality
High Quality, Superior Quality
noun, な adjective, の adjective
Good quality is always good quality. Don't skimp!
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
朝食には、良質なタンパク質を取るよう心がけています。
I'm trying to make sure I consume good quality protein for breakfast.
子供には良質で安全な食べ物を食べさせてあげたいです。
I want to feed my kids high-quality and safe food.
良質のワインを飲む事が私の唯一の楽しみだ。
Drinking good quality wine is my only pleasure.