The shoecover that does everything well.

Castelli calls it the Pioggia Shoecover, and although the name is Italian for “rain,” that doesn’t really capture the essence of this bootie. Sure, it’s completely waterproof, with sealed seams, a waterproof zipper, and a silicone-sealed top edge to keep water from entering. But they've also backed the PU-coated fabric with fleece to make this bootie warm in the coldest conditions, while the high stretch gives it a close, comfortable, and aero fit. 

It's the all-around bootie for wet conditions.