Well you voted them down, but I find mine to work well. I dont know they waterproof anything, because remember as soon as your body heat turns water to vapor it can pass both ways through gortex. But I found they are light, warm and mine were insulated. I wear a very thin polyproplene liner sock with them, just as with wool socks, and they are great. Makes an uninsulated boot as warm as a heavily insulated boot, without making you feel like a snowman. They keep your feet pretty darn dry as well if the boot gets wet. Neoprene socks, just make your feet soaking wet with persperation. Fine in certain enviorments, but not hiking or biking. Bought my gortex socks from cabelas by the way. I am sure the same company makes most all of them.