Most cycling shoes are designed to be as well ventilated as they can, which might be great on the warmer days, but when it gets colder, sometimes a thicker sock just won’t cut it.
Overshoes are like a jacket for your feet, designed to go over the top of your shoes in order to cover those vents and protect you from the elements. And much like jackets, they will come in different weights, some warmer, some cooler, some waterproof and some windproof.
As there are many different kinds of cycling shoe, so too, are there different types of overshoe, designed with different cuts to fit with specific kinds of cycling shoes.