The first waterproof overshoes that I've actually had dry feet in. They usually let water in the bottom or over the top of the cuff but not these, the extra length is the key bit.
They are flexible enough that I can put them over my shoes even with toe covers on and they do keep my feet a bit warmer anyway due to blocking all the wind and not letting much warm air out.
I have tried so many, even officially testing new Rapha ones and I've never found one that does both warm and completely waterproof.
I used these through last winter and they were amazing.
https://www.gripgrab.com/collections/shoe-covers/products/aqua-shield-high-cut-road-shoe-covers
The first waterproof overshoes that I've actually had dry feet in. They usually let water in the bottom or over the top of the cuff but not these, the extra length is the key bit.
They are flexible enough that I can put them over my shoes even with toe covers on and they do keep my feet a bit warmer anyway due to blocking all the wind and not letting much warm air out.