Joined: Aug 2010
Posts: 12,753
Likes: 2,112
From: Madison, WI
Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.
I have used plastic bags over just the front third or so of my socks so that the shoe mesh vents were blocked, blocking the air flow. But I did not want to block the remaining parts of my socks from being breathable, as when I warm up I wanted any sweat to be able to evaporate. I only wanted to disable the shoe venting.
An FYI, you can buy waterproof socks. I have also used those in colder weather. Seal Skinz and Dexshell are popular brands. I have some Dexshell ones. I have not stepped in a puddle to test them, but I put my hand in them in a sink full of water, they passed that test.