Holy cow these things are tough to get on! I'm not entirely sure if the added waterproofness compensates for the price and difficulty. Best installed with a key to pry up the elastic cords on the shoe. There seems to be no right order to do it - attach gaiter then put shoe on, or shoe on then gaiter. Once you've gotten them assembled, they genuinely seem to work well, though it will have probably stopped raining by then. Much more comfortable than wearing a boot, though.