Castelli Pioggia 3 Shoecover
'Pioggia' is the Italian word for 'rain' and that tells you what these overshoes are all about. They're made from a polyurethane-coated fabric that won't let water through. And when I say that it won't let water through, it really won't. I scrunched one of these up and left a pool or tap water in the fabric and it was still there a day later. Of course, that's not real-world testing but, believe me, water doesn't soak through here.