pera-pera
Material that is paper-thin and lacks substance or quality. Often implies cheapness or fragility.
💡Examining a cheap shirt — 'This fabric is pera-pera, it'll tear easily.'
この生地はぺらぺらで安っぽい。
This fabric is pera-pera and looks cheap.
The cheap shirt was so ___ I could see through it.
安いシャツが○○で向こうが透けて見える。