I wear my old shoes every day. One sole has come unglued.

我天天穿我的旧鞋，一个鞋掌掉下来了。

《柯林斯英汉双解大词典》

When you can see white midsole material poking through the outsole or when the sole under the heel looks crushed, the shoes are long past their prime.

当你看到白色的中底材料已经穿透大底，或者脚跟处的大底看起来已经裂了，那么这双鞋早就寿终正寝了。

youdao

Those who wear them wear them religiously and are die hard wearers of their shoes until they have a hole on the sole, which is a wonderful excuse to go out and buy another new funky pair.

那些顽固的框威穿客，他们通常要等到鞋底穿破个洞，才给自己个借口再去买一双。

youdao

Some other hallmarks of the season: Both lug-sole shoes and dainty heels are in vogue.

WSJ: Bold Fashions for Fall 2013

The sole of each of his shoes is lacquered in a vivid, glossy red.

NEWYORKER: Sole Mate

In that vein, a federal court of appeals recently ruled that Christian Louboutin owns trademark rights in his distinctive red outsoles since they identify him as the sole legitimate source of his shoes, while Yves Saint Laurent and other parties retain the right to produce and sell monochromatic red shoes (where both the outsoles and uppers are entirely red).

FORBES: Protecting Fashion Designs