Closed-toe shoes (no sandals), blouses, hose and conservative hair, jewelry and makeup are expected.

最好的穿着是封闭的鞋子（不是凉鞋），宽松的上衣，长筒袜，保守的发型、珠宝、以及淡妆。

youdao

Straw sandals need no last; the shape comes with the weaving — work things out as you go along.

草鞋没样，边打边像。

《新英汉大辞典》

No, it was really Pandora; there were her small dark feet in loose sandals firmly planted on the platform below. How did she get there before him?

真是的潘多拉.她那双暗色的小脚穿着双宽松的凉鞋 正稳稳地站在下面的站台上.她是如何在他之前赶到这儿的?

youdao

And because the lightweight sandals offer virtually no protection, it's more common for wearers' feet to get cuts, scrapes and bruises.

CNN: Flip-flops present feet with a painful problem